• Withings has unveiled its Body Scan 2 smart scale at CES 2026
• The device measures over 60 biomarkers to predict your future health
• It also features built-in AI and personalized wellbeing prompts

Think all the best smart scales are just about measuring your weight and giving you a couple of handy pointers? That’s not what Withings wants you to believe, as it’s dubbing its new Body Scan 2 device – unveiled this week at CES 2026 – “the world’s first science-backed longevity station.”

That all sounds pretty grand for a smart scale, so what has prompted the apparent upgrade? According to Withings, it comes down to a few things: the inclusion of over 60 different biomarkers for your health, plus personalized artificial intelligence (AI) integrations that give you tailored and actionable advice. The idea is that these will help improve your long-term health, hence the “longevity station” moniker.

Aside from its software, the Body Scan 2 has a set of eight electrodes in the base and a further four in its retractable handle. There’s an LCD screen that displays scan results, plus two buttons for answering personalized questions relating to your health. On the inside is a rechargeable battery that lasts up to 15 months on a single charge.

The Body Scan 2 starts by offering up a “90-second multimodal longevity assessment” that scans various metrics, including your heart pumping performance and electrical activity, hypertension risk, artery health, cellular health and metabolic efficiency, and your glycemic regulation. Withings says these tests have been chosen for their “predictive value on long-term health,” so taking action on them could help improve your health in the long run.

Once this scan has been completed, the device seeks to find reversible deviations from your health baselines. After that, it gives you actionable steps to tackle the problems and increase your wellbeing. That includes a Health Trajectory score, which Withings says “offers a clear view of long-term health” and aims to motivate you by showing you how changes you make now could improve your outlook for the future.

Withings vs Wyze

The Withings Body Scan 2 follows shortly after the similarly named Wyze BodyScan scale, which also came with a built-in handle for measuring extra health metrics.

However, at $599.95 (around £445 / AU$895), Withings’ offering costs significantly more than the $119.98 Wyze scale. At the same time, it comes with more built-in electrodes, can measure far more metrics, and comes with AI included, which the Wyze device does not.

Both devices give you a high-tech way to measure your wellbeing and make changes to your lifestyle. The Withings Body Scan 2’s focus incorporates more future-gazing features, though, so it might be one to consider if you want to adjust your lifestyle now in order to benefit your prospective self.

Withings says the Body Scan 2 will be released in Q2 2026 and will be available on Withings’ website, Amazon, and at “select retailers.” We’ll have to see how it compares to the competition when it releases and whether it has what it takes to top the smart scale charts.

• Wyze has launched the Scale Ultra BodyScan smart scales
• The device comes with a handle for more accurate readings
• It can measure your arms, legs and torso individually

When it comes to understanding your health and fitness, a smart scale can be a useful weapon in your arsenal. Right now, our pick for the best smart scale is the Xiaomi Mi Body Composition Scale 2, but smart home firm Wyze is hoping to knock it off its perch with its latest effort.

That product is the Wyze Scale Ultra BodyScan. This set of scales boasts “professional-grade body composition analysis,” Wyze claims, and sits at the top end of its range of smart body scales, alongside the likes of the Withings Body Scan.

The big addition this time is a built-in handle that’s attached to the scale using an extendable cord (something it shares with the Body Scan). This comes equipped with a set of electrodes that pair up with electrodes in the scale itself (making eight in total), and together these are used to measure your wellbeing across a range of metrics. This allows for more accurate data collection than simply gauging inputs from your feet.

Wyze says the handle provides “deeper, segmental insights and more accurate, personalized results” by allowing the scale to measure your arms, legs and torso individually. Instead of an overall idea of your health status, you get a more nuanced picture.

High-end health

Once all that data has been collected and quantified, you’ll be able to view your health insights using the scale’s 4.3-inch color display.

The device rounds up 13 different wellbeing metrics, including weight, body fat percentage, heart rate, lean body mass, and more. There are also ongoing trends to be found if you want to see how you’re doing over time.

And since the product comes with Bluetooth, you can sync all that data to your phone or other connected device and view it there, if you like. It’s compatible with popular fitness apps like Apple Health and Google Fit, and Wyze will send you a PDF report of your latest health metrics for easy consumption, too.

Wyze has priced the Scale Ultra BodyScan at $119.98 (around £90 / AU$185), which is significantly more than its other scales, including the $49.98 Scale Ultra and the $38.98 Scale X.

Still, with a more comprehensive feature set, it might make a run at a place on our list of the best smart scales before too long.

Wyze Scale X: One minute review

The Wyze Scale X is a great value addition to the best smart scales that combines the best of Wyze’s other offerings, the standard Wyze Scale and the Scale S. Small additions here make it useful in many different scenarios, such as providing modes for weighing babies, pets, and separate body composition modes for pregnant women and dedicated athletes. 

The scale was quick and easy to set up, and we were able to start using the scale straight away. The presentation of data was extremely accurate, matching the measurements of other smart scales we’d reviewed such as the Eufy P2 Pro, and historic data was viewable in-app and presented on handy graphs to help you plot changes more easily. 

The different metrics available were great and exactly what you’d expect from a premium scale, even one that cost half as much again. From bone mass to basal metabolic rate, you’re able to calculate everything here, and the companion all can even use your phone’s flash to check your pulse through your finger. 

The Scale X provides a full suite of wellness tools, and we were impressed with the breadth of metrics on offer to help provide a complete picture of health. 

Wyze Scale X: Price and availability

• $33.99 (approx £29 in the UK and AU$49.50) plus shipping
• Only available in US stores and some third-party outlets, such as Amazon

The Wyze Scale X is available on the Wyze store site for $33.99 in the US. That’s $10 more than the original Wyze Scale, but still far cheaper than many of its contemporaries and it’s very much their equal in quality. It comes equipped with four AAA batteries to set up and use the scale from the outset. Future batteries will, of course, need to be bought separately. 

Unfortunately, it becomes harder to find outside the US for as good value. Amazon and other third-party sites do stock the Wyze Scale X in Australia and UK stores, and will ship internationally, but it may not end up being anywhere near as good value. 

Wyze Scale X: Design

• Same glass look as competitor smart scales
• Innovative foot design
• Companion app can be tough to read

The Wyze Scale X has got a great look, albeit one comparable with many smart scales on the market right now. It’s essentially a piece of full-surface sensor glass divided into four quarters, with the Wyze logo at the bottom and an LED screen showcasing weight and other readouts in white light, with a durable plastic rear casing. 

One small innovation we like is that the feet aren’t simple rubber strips: they are separate plastic cases with built-in shock-absorbing cushioning that connects to the base of the unit, to prevent damage to the unit when stepped on repeatedly. 

The unit is only half the design situation, however: the Wyze companion app is simple to use and largely well-designed, allowing you to scroll through all 13 metrics with ease. However, there is one design feature we didn’t like: although all the metrics come with an explainer to give you some context, most are on a sliding scale, with some parts of the bar as seen below a solid green or a simple outline. 

This mono-color means you don’t get a clear indication of a “bad” reading over a “good” one, and the scale is vastly different between each metric. This makes the information hard to read correctly - is my bone mass too low? My Basal Metabolic Rate too high? Once I got my initial readings, I had to turn to Google for more information, a clear indication that I needed more in-app information here. 

• Design Score: 3/5

Wyze Scale X: Features

• 13 different health metrics
• Baby, pet and luggage mode
• Exports to three other health services

Like any smart scale, you step onto the Wyze Scale X and it shows you your weight. However, the additional 13 metrics the Wyze Scale X provides are body fat, muscle mass, body water, lean body mass, bone mass, protein, visceral fat, BMR, metabolic age, and muscle mass percentage. It's even able to take your pulse live.

By their very nature, these metrics are presented quite differently: some in terms of weight, others in percentages, others still in calories, metabolic years or even an unnamed index (for visceral fat) so, as mentioned above, they aren’t as intuitive as they might be. They’re lacking a unifying way to pull them all together, such as the Eufy scale’s digital avatar of a person, or Fitbit Premium’s translation of complex figures into simple health-related scores. 

Nonetheless, these are a great way to build up a complete picture of your health, and all of this data can be exported to Apple Health, Fitbit or Google Fit. This is the complete list of external health apps Wyze can interface with, so Samsung Health users and others are unfortunately out of luck, but the majority will be able to use one of the three if they want to move their health data elsewhere. 

The stats are gleaned by bioelectric impedance analysis, which sends an electrical current through your body in order to analyze its makeup. Electricity moves at different speeds through different materials: it would move through bone, for example, at a different rate than fat or muscle. This makes it a bit like electrical sonar, as it works to build up a picture of your health. 

But it’s not just your health: while you won’t be able to get the full spectrum of metrics, you can calculate the weight of babies, pets, and luggage using a specialist mode for each. Simply pick up the baby, cat, or suitcase of your choice, step onto the scale, and it will use your usual weight to calculate the difference. 

• Features score: 4/5

Wyze Scale X: Performance

• Easy to use and set up
• Information presentation is frustrating
• Historical graphs are good

The scale was very simple to set up on my phone, and once I’d input my age, height and activity levels into the app, stepping on the scale promptly produced a reading in line with previous smart and analog scale readings. I’m satisfied as to its accuracy, as the baseline or more obvious stats such as weight, body fat percentage and BMI didn’t tell me anything I didn’t already know. 

The only gripe I have at this stage is one I’ve shared above: the different scales the stats are based on and the lack of presentation involved. Swiping across my bone mass percentage, muscle mass percentage, and other stats, I came across ‘visceral fat’ and a flat number: six. 

The app helpfully includes an explainer that visceral fat is “a type of body fat stored within the abdominal cavity” and a bar with 12 written squarely in the middle. I assumed that lower is better and I’m six on the visceral fat scale, with 12 being either average or a ‘danger zone’ of sorts. However, I didn’t know what the scale really meant. Six what? Percent? Minutes? Years to live? 

A quick bit of googling shows this ‘visceral fat level’ is a range of numbers generated through body composition tests, and 1-12 is a healthy rating. However, I shouldn’t have to google this statistic to get the whole picture. Some of my scores were right on the extreme ends of the single progress bar the Wyze app uses for every metric, even though during my research, I was found to be perfectly within normal limits for each one. All the information recorded might be accurate, but Wyze could do with taking a good leaf out of Fitbit’s books when it comes to presenting this information in an accessible way. 

Otherwise, the scale performs as described. The information is crisp and shows up promptly on both the on-device readouts and the app, and repeated use allows graphs to develop to more easily show historical changes. 

•  Performance score: 3.5/5 

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First reviewed September 2022

Two-minute review

The Eufy P2 Pro by smart home companion device producer Eufy is generally a very good smart scale option. Easy to set up and simple to operate, simply step onto the P2 Pro like a normal scale and the device can calculate more than your weight: by inputting your measurements into the app, the smart scale can help calculate muscle health, body mass index, body fat percentage, your basic metabolic rate, hydration and more.

Eufy might be better known for home security cameras and robotic vacuums, so a move into the health space seems out of character. But the scale is generally good: its attractive and understated to look at, all black glass and steel, and is able to be stored unobtrusively. 

Its app is simply designed and easy to use, even if using the included tape measure to input your vitals is a little awkward at first.  There are a few small issues keeping it back that I wish had been thought through more, including certain features that seem tailor-made to trigger anxiety and hamper inclusiveness. 

However, when dealing with a device that measures your body weight, it’s hard to create a kind, welcoming experience. Eufy is good at what it does, presenting its information in an easily accessible and informative way. 

Eufy P2 Pro: Price and availability

The Eufy P2 Pro is out now, priced at $79.99 in the US, A$199.95 in Australia and £54.99 in the UK from the EufyLife website, Amazon and other retailers.  

Eufy P2 Pro: Design

• Slick looking scale
• Functional app, but digital models need work
• Easy to use

Design score: 4/5

The scale’s design is a simple one: a black or white glass scale bisected twice into four quadrants, coupled with a bright and clear LED screen with simple digital readouts, again broken into four quadrants. The scale stands on four rubber feet to raise it off the ground. 

Rather than a rechargeable model, the P2 Pro operates on disposable batteries, the first set packaged with the product in a handled carry case. Also packaged with the product is a tape measure to calculate the size of your chest, arms, waist, hips and thighs. Once you have all these measurements, you put this information into the app alongside your height and weight and it generates a digital model of your proportions. 

I love the idea, but I can’t say I enjoyed the feature. It’s quite revealing, potentially even triggering for some, to toggle the information on the model and watch your digital avatar get fatter or thinner. There is a small selection of different skin tones as if a cursory bone was thrown to diversity, but that’s all the customization on offer.

Why not do a vitruvian-esque transparent figure, the way Garmin Connect does with its heat maps of the human body, and eliminate any issue with weight and identity? The app in itself, however, is well-designed, with all the information presented very clearly.

Eufy P2 Pro: Features

• Calculates a lot of vital stats
• Pets and kids modes
• Export reports and view history

Features score: 5/5

Speaking of the app’s design, once you step on the scale, the scale’s LCD screen presents you with weight, heart rate and body fat percentage, but the meat of the info is all in the app. It presents information on 16 different metrics: Heart rate, weight, body fat percentage, BMI, hydration, muscle mass, bone mass, basal metabolic rate, lean body mass, body age, body type, subcutaneous fat, body fat mass and cellular protein. 

It calculates all these, like most smart scales, through bioelectrical impedance analysis, or BIA: sending harmless electrical currents through your feet that take detailed readings of your body composition. 

All of these metrics are shown on scales of “low” to “high” and information is provided on what exactly each figure means, as well as tips to improve or maintain normal levels. You’re also able to set goals for overall weight and body composition, so you can measure your current stats and historic progress against these two goals. 

There are some neat additional modes available, including profiles specifically for pets and babies although this offers weight only rather than any additional functionalities. Having their own profile means that, with a swipe on the app, you can measure their weight and automatically plot it on a historical graph. Got a chonk of a cat who needs to slim down, or a rapidly-growing baby? You can simply pick them up and step on the scale. 

As well as viewing your history in-app, the app also allows you to export reports to view on your computer or print them off, or sync your data to Fitbit, Apple Health and Google Fit.  It also throws push notifications to your phone to encourage you to weigh yourself regularly. It honestly does everything you’d expect a smart scale to do, and more.

Eufy P2 Pro: Performance

• Plotting progress and regular use was a breeze
• Bone mass was an outlying stat
• Push notifications could be anxiety-inducing

The Eufy smart scale was excellent in most respects. Set-up was easy, bar trying to get the right measurements around your bicep and chest for my digital avatar. Stepping on the scale once a day, I was able to plot a graph of my weight and view all my vital stats. It’s by far the best way to keep track of weight and other vitals, especially as you can export the information if you want to upload it elsewhere, such as Google Fit or an excel spreadsheet or something. 

The one outlying stat that seemed jarring was my “bone mass” readings, which said I was in the “low” category, while everything else was in green “normal” categories. As a 30-year-old man who regularly runs, lifts weights and eats pretty healthily, it’s unlikely I’m in this category: low bone mass, or osteopenia, tends to be a warning sign for those at risk of osteoporosis, such as seniors or perimenopausal women. However, never say never: I’m reviewing the Wyze Scale X next, and should the readings match or not, I’ll update this review with my findings. If both scales tell me I’ve got low bone mass, then I guess it’s off to the doctor. If the Wyze readings come back normal, then I’ll have a bone to pick with Eufy.

Other than worrying about the integrity of my skeleton, the one feature of the Eufy P2 Pro I really didn’t enjoy were the push notifications. Each morning I hadn’t stepped on the scale, I got a message from Eufy on my smartphone with “It’s time to get on the scale and weigh yourself!” It was presumably designed to sound cheery, but the exclamation point does make it vaguely threatening, like a health-conscious version of the Duolingo bird. 

Weight management is a difficult topic for many people. While studies say weighing yourself every day can lead to consistent weight loss, many have a tough relationship with the scale. Push notifications can be easily disabled, true, but encouraging daily use of the scale with a push to your smartphone as the default setting seems a tad irresponsible or insensitive, potentially leading to an unhealthy fixation on the numbers.  

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First reviewed July 2022

Smart scales are a useful tool in your fitness arsenal. They go far beyond your old-fashioned analog scale, providing a standard measurement of weight: these scales interface with your measurements on corresponding apps to offer your body mass index, percentage of fat, percentage of muscle and many more useful health metrics. 

The best smart scales do this fast and accurately, often interfacing with activity metrics from your fitness tracker or smart watch, especially if you find one that interfaces with the same fitness ecosystem as your wrist-mounted device, such as the Garmin Index S2 or Fitbit Aria Air. 

However, smart scales can do so much for you, that it’s important to know how to get the best out of them.

 Setting up your smart scale 

Unlike a normal scale, which just requires you to unbox it and away you go, smart scales demand a little bit more administration at first. Like other electric scales, they tend to run on either replaceable batteries or lithium rechargeable ones, like many other smart devices. 

Once the device is powered up, you’ll need to run through two extra steps: connecting the smart scale to your phone via Bluetooth, and downloading the corresponding app. 

The app itself will differ from device to device, but most apps, like the EufyLife app pictured which matches the Eufy P2 Pro, will at least require you to input your gender, age, and height so that your regularly updating weight can be taken into a slightly wider context. 

Most will be able to use this new information to calculate your BMI, which is a population-level aggregator and estimation of a healthy weight. However, some of the best smart scales do more: to set up the Eufy, for example, you can also input measurements of your chest, biceps, waist, hips and thighs, in order to create a virtual model of yourself in the accompanying app. 

This will allow the scale to more accurately calculate your fitness metrics, including your body composition. The best smart scales tell you your muscle, fat and bone percentages, illustrating whether they’re in or outside a healthy range for your age, height, weight and gender. 

 Using your smart scale 

On the surface, it’s as simple as using a normal scale: step on, and the scale will list off your weight in your chosen denomination (pounds or kilograms) in addition to other statistics on the on-device digital display.

However, the next step is to check your app, which should automatically update with your latest stats. Of course, your updated weight will then impact all the corresponding statistics such as BMI and body composition, depending on what particular statistics your chosen fitness tracker chooses. 

If you’re using a scale linked to your tracker, such as Fitbit Aria or Garmin Index S2, your Fitbit Premium or Garmin Connect account will update automatically with your new statistics. This means your weight, muscle and fat percentages, sleep, activity metrics and more are all in one place – it’s a great way to create a central hub for all your health data. 

Use your smart scale responsibly 

Weight, fat, and activity research, when taken too far, can be a minefield to navigate with our mental health intact. Because of this, it’s probably wise to use your smart scale as a regular check-in to ensure your health metrics are accurate, as it’s easy to become too obsessed with pounds and percentages. We've covered a little bit of this anxiety when talking about Strava and publishing your exercise statistics for everyone to see, but it can equally apply to the pressure you put on yourself.

Research from the University of Minnesota found that when it comes to self-weighing, “with regard to affect, self-esteem and body evaluation, and eating-related behaviors and cognitions, in total, most studies provided evidence of a harmful impact of self-weighing on these outcomes; fewer studies found a positive impact.” 

Numbers on the scale aren’t all that matters unless you’re an elite athlete. If you’re a casual fitness enthusiast and you’re eating healthily, drinking water and enjoying exercise on a regular basis, don’t be disheartened if the scale doesn’t show the result you wanted. 

Our health is not confined to our weight, any more than it's just about our muscles or mobility. Health is, at least in part, a physical condition and that means your whole body - all of you. A typical scale can't measure that, but Withing's wild, new Body Scan device, unveiled at CES 2022, can.

Withings Body Scan is a scale, but it's also a series of sensors embedded in the platform and a special, tethered bar that sits along the top edge of the scale. Weight measurement ends up being the least of what Body Scan can do. It's so advanced, in fact, that the device is not yet approved for use in the U.S. It's awaiting FDA approval.

Why all the caution? Perhaps it's because of how Body Scan works. To measure things like "segmental body composition," and even sweat gland activity, Body Scan sends a low level and what Withings promises is a "safe" electrical signal from the sensors in either the bar in your hands or the pad under your feet to almost instantly read things like impedance. That measurement can tell you a lot about what's going on in the body.

Withings claims it can learn things like fat mass distribution, water percentage, and muscle imbalances, which is why similar health measurement systems are so popular with sports professionals.

The sweat gland measurement in the feet allows Body Scan to track small nerve activity, which gives you a Sudomotor reading (autonomic nervous system control of sweat gland activity).

All the sensors also offer some of the more traditional biometric data, including heart rate, 6-lead ECG recordings to detect arrhythmia, and vascular age (arterial health) measurement. Withings claims Body Scan's algorithms can detect heart rhythm patterns associated with atrial fibrillation.

Body Scan includes a 3.2-inch color display where you can see most of these results, but the device also connects to the Withings App on iOS or Android where you can see it all in detail.

As noted above, Withings Body Scan is still awaiting FDA clearance, but they expect to start shipping it in the second half of 2022. Pricing has not been set.

Devices that can measure all sorts of health metrics are not unusual. We're certainly seeing many new wearables that can read everything from your stress levels to heart rate. However, a scale that also puts something in your hands to measure not just what it can glean from your wrists is something new. The level of detail - readings for individual body parts including your arms, legs, and torso - Body Scan can potentially track is also unprecedented.

It'll be interesting to see how Withings Body Scan makes it through the FDA approval process and how, ultimately, it measures up against all the new healthcare ware coming out of CES 2022.

• Check out all of TechRadar's CES 2022 coverage. We're bringing you all the breaking tech news and launches, everything from 8K TVs and foldable displays to new phones, laptops and smart home gadgets.  

Buying a smart scale can be confusing. So many claims, so many apps, and not all metrics are actually useful. The best smart scales tell you far more than just your weight. Using a companion app, or connecting to one you already use such as Fitbit or Garmin, smart scales use electrical signals to give you insight into how your weight is split between muscle and fat.

They can also provide readings on BMI, metabolic rate, estimate how many calories your body uses each day, and plenty more. These insights can help you see progress, adjust workouts, or simply understand how your body is changing over time. They are useful tools whether you want to lose weight, gain muscle, track changes in body composition, or even monitor your pregnancy.

We have tested every major smart scale on the market using years of tech experience to bring you recommendations you can trust. We check accuracy, app usability, and real-world utility, rating each out of five for performance, value, features, and design.

Only the best make the cut and you won't find any options here that we have not tried ourselves. We have revisited all our top picks to make sure they still hold up in 2026. Whatever your goals and budget, there is a scale here that can help you make an informed choice. No hype, just tested recommendations to help you find the one that works for you.

The quick list

If you don’t have time to read our full list of the best smart scales below, then you can read the round-up below for a shortcut to the top options. If you find one that takes your fancy, use the links to jump to our full write-up.

The best smart scales in 2026

Below you'll find full write-ups for each of the best smart scales in our list. We've tested each one extensively, so you can be sure that our recommendations can be trusted.

The best smart scales overall

The Xiaomi Mi Body Composition Scale 2 takes our number one place as the best smart scale you can buy today. Not only is it a breeze to set up, it also delivers accurate and consistent body composition data that you can track easily in the Mi Fit smartphone app.

The design is sleek and minimalist, the display (which only appears when the scale is in use) is bright and easy to read while standing up, and the non-slip glass platform feels sturdy and stable underfoot.

In our tests, we were particularly impressed by the simplicity of the whole process. If you only want to see your weight then no setup is required at all, but the scale allows up to six people to keep profiles with comprehensive stats including fat and muscle mass, BMI, and even estimated basal metabolic rate.

Your weight and body composition stats will sync with Google Fit, Apple Health and Samsung Health automatically, and if you own a Xiaomi fitness tracker like the Mi Smart Band 6, it's even easier to recommend, as all your health and wellbeing data will be gathered together in one place.

Read our full Xiaomi Mi Body Composition Scale 2 review

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The best budget smart scales

We were blown away by the overall accuracy of the Vitafit Smart Bathroom Scales in our review, considering its incredibly cheap price tag. For a $20 smart scale, the Vitafit is very well built and sturdy, with a sleek design that will look right at home in your bathroom.

It's accompanying app is snappy and helpful, displaying lots of important information in the blink of an eye. Seamless connection is supplied by Bluetooth, and the app works on iPhone or Android.

It'll show you important metrics like weight, BMI, bone mass, basal metabolic rate, and more. It's got a generous weight limit of up to 180kg/400lb and support for limitless numbers of users. There's also functionality to weigh babies and children, so it makes a great scale for the whole family.

It's not perfect, and some of the body composition measurements lack the accuracy of more expensive alternatives, but at this price, it's hard to argue with as a budget pick.

Read our full Vitafit Smart Scale review

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The best premium smart scales

The Withings Body Scan smart scale has all the basic features and more, showing you simple metrics such as basal metabolic rate, your vascular age, or more esoteric info such as pulse wave velocity.

Though it comes with an eye-widening price tag, it's a fantastic model if you want to take a deep dive into your body stats, and ideal for families with space of up to eight profiles. One of the most impressive features of the Withings Body Scan smart scales is its segmental body composition analysis, stretching across six separate areas including muscle mass and water mass.

But it's the accompanying Withings Health Mate app that takes the smart scales to the next level. When set up, the app does more than show your stats, providing guides that explain what your measurements mean if you're unsure. In addition to reading your measurements, the app will take your stats to identify changes and keep you updated on which direction your health journey is going.

Aside from its complex features and in-depth analyses, the scales are very simple to use and show you everything you want to know on the display screen during casual weigh-ins. They also adopt a slick and modern design, with a useful handle that acts as a wall mount.

Read our full Withings Body Scan review

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The best smart scales for fitness

The Withings Body Cardio is the company's most advanced smart scale. Not only does it give an accurate measurement of your weight, muscle mass, body fat and so on, it can also provide an indication of your overall cardiovascular health, and help you take action to improve it.

The scale can measure both standing heart rate and pulse wave velocity. A lower heart rate is generally a sign of better fitness, while pulse wave velocity indicates how flexible your arteries are. Stiffer arteries mean your heart has to work harder to pump blood around your body.

If that sounds confusing, don't worry – it's all clearly explained when your data is synced with the Withings Health Mate app (via either Bluetooth or Wi-Fi). together with practical advice to help you improve your readings.

This isn't a scale you'll want to be carrying often (it's much heavier than the others in this listing), but its two-layer design with no feet means it can be used on any type of floor. That's a real win if you want to weigh yourself in a carpeted bedroom – electric scales are usually only suitable for hard floors,

This is a premium scale, and has a price tag to match, but if you're interested in making long-term changes and improving your fitness rather than just losing weight, it could be well worth the investment.

Read our full Withings Body Cardio review

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The best smart scales for added features

Eufy's Smart Scale P2 Pro is a feature-rich full-body monitoring system that can measure 16 different metrics for multiple members of your household, including pets and babies. But this smart measuring device can do more than just measure weight and body fat – the P2 Pro can also measure resting heart rate, protein percentage and body age, among other things.

But wait, there is more! Via the EufyLife app, you can also log your food intake – just like in MyFitnessPal – and set goals, create weekly/monthly reports, check daily/weekly/monthly/yearly trends and more. Needless to say, the more you use the scale, the better, as frequent measurements will help the app and the scale build a more accurate picture of your body.

Sadly, not all measurements are accurate, especially fat calculations. During our testing, both visceral and subcutaneous fat levels were reported as high, despite the overall body fat level being in the normal range. Even more strangely, this overall fat level was also much higher than expected; our reviewer had a DEXA scan done and been given a fat score of 12% three months prior to testing the Eufy P2 Pro, yet the scale said he had 21% body fat – and that's without any visible changes in physique.

Resting heart rate and, therefore, basal metabolic rate (BMR) measurements also seem off. Nevertheless, we enjoyed using the Eufy P2 Pro, and considering the low price, it's easy to look past the scale's flaws and appreciate its many useful features. The P2 Pro might not be the best smart scale on the market, but it's worth the money – not to mention, it syncs with third-party apps such as Apple Health, Google Fit and even Fitbit.

Read our full Eufy P2 Pro review

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The best Garmin smart scales

The Garmin Index S2 is another Wi-Fi-enabled body composition smart scale, that delivers accurate, consistent results. Its screen is particularly high resolution, which allows you to see detailed graphs of your weight over time.

Data from the scale syncs with the Garmin Connect app, which you'll already be familiar with if you own one of the company's running watches or fitness trackers, allowing you to see all your health data in one convenient place. Garmin Connect also synchronizes with a bevy of third-party fitness and diet apps, including MyFitnessPal, Nike+, and Noom to name just a few, so you don't have to enter data from your weigh-ins manually.

We'd appreciate a little more context around each of the metrics shown in the app (for example, it would be helpful to know whether your muscle mass is normal for your age and gender, and how close it is to the boundaries) but this is nevertheless a great smart scale if your budget will stretch to it.

Read our full Garmin Index S2 review

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Also tested

Not every smart scale we test makes the cut, here are some of the models we've tested elsewhere on TechRadar that didn't make the grade, along with links to our full reviews.

How to choose the best smart scales for you

The top smart scale for your needs is likely going to be the one that suits your lifestyle. Firstly, there are budget considerations to be made. However, most of the scales on this list can be picked up fairly cheaply, at least compared to other pieces of smart technology.

If you’re just looking for a simple body composition-measuring device that doesn’t cost the earth, you may want to check out the uncomplicated, relatively affordable Eufy Smart Scale C1 or Eufy P2 Pro, as both are very comprehensive and offer you great value for the price.

It’s also worth considering the tech you already own and factoring that into the decision you make. For example, if you’re already heavily invested in the Fitbit economy (i.e. you own one of our best Fitbits and you subscribe to Premium), you may want to pick up one of Fitbit’s Aria-branded scales, which can
upload your data automatically to your Fitbit app. On the other hand, if you already own one of our best Garmin watch picks, the Garmin Index S2 might be the only scale that makes sense for you, as it interfaces in a similar fashion with the Garmin Connect network.

Finally, you obviously want something that looks nice if you're going to be leaving it out to step on every day. Most of the above scales look sleek with their glass platforms, but some can be found in multiple colorways. All are pretty slender, so if you can't find one that fits your vibe, you can always tuck it in a cupboard out of the way when guests are over.

Why get a smart scale?

Measuring your weight can have a positive impact on your weight loss efforts. One study published in the Journal of the Academy of Nutrition and Dietetics found a daily weighing habit improved overall weight loss in overweight participants. Smart scales can take these measurements and automatically upload it to an app, so you can better keep track of your progress. Whether you're trying to build muscle, lose fat or simply stay a healthy weight, smart scales are a powerful tool.

However, for some people, weighing themselves too often can create a challenging relationship with their bodies, especially those who are just beginning a weight management journey. It could potentially lead to unhealthy habits and disordered behavior, so if you see the signs that you're weighing yourself compulsively or too often, don't be afraid to take a break from the scale.

Likewise, if you do have issues around your weight or numbers on a scale are particularly triggering for you, a smart scale may not be the best option to keep you healthy.

How we test smart scales

As you can see in the entries above, we test each smart scale comprehensively. We look at the design of the scale, and that’s not just about looks: we check out whether it’s difficult or easy to set up, how complicated it is to operate, and the design of the companion app if it has one.

We also examine its features, such as what metrics the scale gives you, how many of these are useful, and if the scale requires batteries to be replaced rather than recharged. Finally, we look at its performance, checking its accuracy against its competitors. Check out our how we test page for more.

Fitbit has registered a patent for a wearable device that can measure the health of your arteries, and pick up early signs of high blood pressure.

The patent listing (spotted by Gadgets & Wearables) was registered on December 4, is brief, but describes how a device like a wrist-worn fitness tracker could be used to measure the stiffness of your arteries non-invasively.

It wouldn't require an extra sensor; instead, it would use the optical heart rate sensor already included in all current Fitbit devices. This would detect changes in blood flow during exercise, which could then be analyzed to estimate pulse wave velocity – the rate at which waves of pressure move through your arteries.

If your pulse wave velocity is particularly fast, it's an indication that your arteries aren't as flexible as they should be, and therefore can't expand as blood is pumped from your heart. It also means higher blood pressure (or hypertension), which is a leading cause of heart disease and stroke.

This is the same tech used in the Withings Body Cardio, which we reviewed earlier this year and ranks highly in our guide to the best smart scales, as well as several Samsung Galaxy smartwatches.

Measuring pulse wave velocity is easier with a scale, since the person is standing still. A wearable has to factor in 'noise' caused by body movement tha could distort the readings, but although Fitbit has its own line of smart scales (the latest of which, the Aria Air, was released in 2019), the new patent relates specifically to wearable devices.

Since it doesn't require additional hardware, it's possible that pulse wave analysis could come to existing Fitbit devices in the form of a software update.

We wouldn't expect it for a while though; a patent registration isn't a guarantee that a feature will ultimately be released to market, and after development and testing, it need to be approved by the US Food and Drug Administration, as well as the relevant authorities in other countries where the device is sold. We'll keep you updated as soon as we know more. 

Analysis: early detection matters

Fitbits aren't medical devices, and the company makes it clear that they can't be used to diagnose or treat any illnesses, but they can still be useful for picking up early indications that something is amiss.

The Fitbit Sense and Charge 4 both have eletrocardiogram (ECG) sensors that can pick up signs of atrial fibrillation (an irregular heartbeat) that should be investigated by a doctor, devices with SpO2 sensors can detect unusual drops in blood oxygen saturation overnight that might be a symptom of sleep apnea.

If you're worried, the app can take this data and turn it into a PDF report that you can share with a family member or doctor.

More recently, Fitbit has taken part in a study that suggests data from its fitness trackers could help identify early signs of Covid-19 infection before a person starts to show symptoms.

Hypertension is known as 'the silent killer' due to its lack of symptoms in its early, most treatable stages. Millions of people wear a Fitbit device every day to to monitor their daily steps and exercise habits; if that device could also pick up signs of high blood pressure, it has the potential to help save lives.

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30-second review

Anyone looking for a quick and easy way to monitor their weight will love the Renpho Smart Body Fat Scale. Not only does it make something of a style statement, this tempered glass and plastic smart scale is wonderfully accurate, allowing precise calibration in a couple of seconds and providing very accurate weight readings from there on. You’ll get pinpoint readings in increments of 0.2lb/0.05kg right up to a total 396lbs/180kg maximum weight capacity.

Renpho matches the precision of its digital scales with its app, which (once paired with the hardware via Bluetooth) can provide owners with up to 13 different measures.

Renpho has also designed everything so you can use it in tandem with the likes of Apple Health, Samsung Health, Google Fit and Fitbit too. It’s therefore a great option if you’re serious about monitoring your weight and everything that goes with it.

Price and release date

We tried the Renpho Smart Body Fat Scale in its Basic incarnation, the ES-CS20M-B, which features 3 AAA batteries and has a RRP of $27.99 on Amazon in the US or £37.99 on Amazon UK. That makes it one of the cheapest smart scales we've tested to date, around the same price as the Eufy Smart Scale C1 and Xiaomi Mi Body Composition Scale 2.

There’s also a lithium battery edition, the ES-30M. Both models come with a black finish. Alternatively, check out the ES-32MD model if you want the Renpho Smart Body Fat Scale in white.

Design

Bathroom scales have been around forever and, frequently, sit in a corner of the smallest room hidden from view and gathering dust. Not so the Renpho Smart Scale as it’s one of a new breed of bathroom scales that actually looks very cool.

The scale arrives in a pizza-shaped box containing the scale, three AAA batteries to power it and a very small, minimalist manual. Renpho advises that you download the supporting app where you can take a deeper dive into its innermost workings.

This is a smart scale that feels like a quality purchase, and comes finished in classic black. The platform is made of tempered glass with four metal circles embedded. These contain electrodes that gather your weight data when you’re standing on the unit. There’s a red LED display that shows your weight, while the batteries fit into a slot on the underside. Also underneath are four feet with moveable anti-slip rubberized pads so that it sits firmly on a hard surface.

Its dimensions are 28cm/11-inches by 2.54cm/1-inch, which is about standard for a smart scale. Overall the design looks great and the build quality suggests that the Renpho Smart Scale should last you a while, assuming you keep it plied with batteries.

It’s easy to pick up and put away, weighing in at 2.86lb/1.29kg, although if you’ve got a decent-sized bathroom the overall appearance is so good you may well want to leave it on display. While the scale itself is slick, stylish and minimalistic it’s the accompanying Renpho app, which connects via Bluetooth, where things get rather more interesting. Renpho has developed software that delivers a lot more than the dusty old scale you might be used to. It's nicely designed and proves to be the perfect accompaniment to the scale.

Performance

Renpho has created its app (available for iOS and Android) to let you get much more from your scale. For starters, it can work in tandem with Apple Health or Google Fit as well as Samsung Health and Fitbit. That’s great news if you’re serious about your health and fitness, while even if you only have a casual or passing interest in managing your weight these options do allow you much better monitoring of how things are looking.

Better still, the app lets you to do this over time too, so you can see the bigger picture. It makes a lot of sense. In fact, the app is quite good at drawing you in and taking more interest because of the fascinating insights it delivers.

For example, the Renpho app doesn't just give you your weight because on top of that it’ll also offer up information of 13 areas of your personal health. This includes body mass index (BMI), body fat, subcutaneous fat, visceral fat, body water, skeletal muscle, muscle mass, bone mass, protein, metabolic age, BMR (basal metabolic rate) and fat-free weight.

Making it more appealing is the ability to set goals and subsequently track your progress. This is invaluable if you’re looking to shed a little weight on a casual basis, or send a lot of it packing via a regime of regular workouts.

Another benefit of the Renpho app is that it’s possible to create different profiles, so that the scales will offer personalised data sets to whoever steps on it within your family circle. In the time we’ve been trying it the Renpho Smart Scale and app pairing has provided us with some really useful data, which obviously maps your progress from days into weeks and even years if you’re prepared to stick with it.

One point to note is that you may need to recalibrate the unit if it’s moved or turned upside down. This is easily done by stepping onto the scale with one foot and allowing it to reset itself.

Overall, we found the Renpho Smart Scale and app combination very impressive. We’ve also been impressed by the Athlete mode on the app, which delivers those more in-depth stats if you’re someone who exercises regularly.

First reviewed October 2021

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• Check out our complete guide to the best fitness trackers

MyKronoz MyScale one-minute review

Smart scales are everywhere, and the MyKronoz MyScale is among the best-looking, but do you need its bioelectrical impedance analysis?

As well as measuring your weight and calculating your body mass index (BMI) this Swiss-designed scale sends a mild electrical current through your body to measure resistance. It then gives you stats on your weight, body fat, muscle mass, bone mass and body water percentage. They’re just estimates, but they’re useful for an insight into your body’s composition.

The MyScale also collects something that most smart scales don’t – your heart rate – though we’re not sure why. After all, after you've walked over to your scale, it’s not going to be measuring your resting heart rate. Given that you can measure that more easily when using fitness trackers and smartwatches, we’re not convinced MyScale needs a heart rate sensor.

The MyScale is physically impressive, but not without flaws. Its attractive circular glass form comes with a hidden LED display that’s large and shows all the data you need in large colourful characters. However, it’s not as stable as it should be when placed on a flat surface and if you’ve got big feet then you’re probably going to obscure some of that large display with your toes.

However, with its sleek look and a mostly clean app the MyScale is a good, albeit expensive, first effort from MyKronoz.

MyKronoz MyScale price and release date

• Available now
• Expensive for a smart scale

The MyKronoz MyScale was released in April 2021, and costs $99.90 / £99.90 (about AU$140) direct from MyKronoz.

That puts it at the higher end of the price range for smart scales, sitting in between the Withings Body+ and the top-tier Garmin Index S2. Our current top-rated smart scale, the Xiaomi Mi Body Composition Scale 2, is a third of the price.

MyKronoz MyScale design

• 340 x 340 x 270mm
• Color display
• Recharges via USB-C

The MyScale has a sleek look. Fashioned from black or white tempered and mirrored glass, this circular scale looks the part in a bathroom. Designed to be used on hard floors, it measures 340 x 340 x 270mm and weighs 4.6lb/2.1kg. There are four spring-loaded sensors on the underside. The mirrored effect is nice, but the black version does collect a lot of smudges, so plan on giving it a polish now and then.

Unlike most smart scales, which for some reason tend to be battery-powered, the MyScale recharges via USB-C (there’s a slot nestled into a recess on the underside). However, with a 3,000 mAh battery inside there shouldn’t be much need to recharge it. MyKronoz says they’ll last about a year, though obviously that depends on just how obsessed you get with your weight, BMI and fat/muscle/bone/water mass.

The MyScale supports up to eight different user profiles, with the AI detecting which person is standing on the scale. You’ll know if it’s got that correct or not because the user’s alias – a six-character name assigned to each user via the app – is displayed just after their weight is measured.

MyKronoz MyScale performance

• Measures weight, heart rate, body fat, muscle mass, bone mass and water
• Calculates BMI
• Bluetooth 4.0 and Wi-Fi

We’re not convinced MyScale needs a heart rate sensor. Not only do many fitness trackers and smartwatches now offer the same thing, but having walked to the scales it’s likely that your heart rate is slightly raised. Ours definitely was, with readings consistently higher than our resting heart rate. It’s consequently not a useful measurement.

The MyScale isn’t as rock solid as it should be. Put one foot on it and it not only rattles but feels unsteady, as it’s going to tip over. However, once on its platform an impressive performance unfolds.

The MyScale gets to work quickly, measuring weight and colorfully displaying it, with red or green arrows indicating whether you’ve lost or gained weight since your last weigh-in. You then see a calculation of your BMI. After a short beep that confirms that your body composition stats have been compiled, you see readouts of your body fat, muscle mass, bone mass and body water percentage.

Unlike some smart scales, this one also has a heart rate monitor built-in. Another beep confirms that your heart rate has been read, after which it's displayed. Then you get a very basic weather forecast (a graphic of a sun/cloud plus a temperature). It then visually syncs the new data with your account in the cloud, and within a few seconds a notification appears on your phone.

The LED display uses large pixels, mostly while but sometimes blue, yellow or red. Trouble is, the display is so large that the readouts will be covered by your toes if you have big feet. We physically had to widen our stance to read the display properly.  

MyKronoz MyScale companion app

• Needs at least iOS 9.0 or Android 6.0
• Works with Apple Health and Google Fit
• Well designed app interface

MyScale doesn’t work well without the MyKronoz app largely because to calculate BMI it needs to know height, which is collected – along with age – from a series of in-app prompts that set-up MyScale. MyScale uses Wi-Fi to sync your data with the cloud (as well as to fetch the weather forecast) so you need to input your Wi-Fi network details. 

A dashboard page on the app contains all the essential details, with current weight and target weight up top, and body composition stats displayed below alongside icons. It saves all these measurements on a ‘history’ page, which you can see as a list or inspect by month and date. 

You can also use the MyKronoz app to customize exactly what measurements you want to be shown on the MyScale’s LED display during each weigh-in. 

It can send data for all or some of four metrics – weight, body fat, BMI and heart rate – to Apple Health and Google Fit. There’s a page in the app where you can tell it exactly what to upload and what not to (for example, if you have a smartwatch then you will probably have a more useful heart rate sensor already). 

First reviewed September 2021

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The best smart scales shouldn’t be complicated. However smart it seems on paper, the Mi Body Composition Scale 2 from Chinese brand Xiaomi is all about minimalism. It doesn’t look much and, to the lay user, nor does it do much. In fact, unless you’ve downloaded Xiaomi’s Mi Fit app, you could be forgiven for thinking that the Mi Body Composition Scale 2 is just a digital scale of the kind that has been around for decades. 

However, there’s a lot going on under its tempered glass hood. Not to be confused with the simpler Xiaomi Mi Smart Scale 2, the Mi Body Composition Scale 2 uses bioelectrical Impedance Analysis (BIA) to present you with data on your weight, muscle mass, BMI, bone mass, body fat, visceral fat, basal metabolism, water and an overall ‘body score’.

The Mi Fit app deals with all that, presenting easy to read scores and charts, but you don’t have to get involved in any of that. The beauty of the Mi Body Composition Scale 2 is that you can just step on it, see your current weight, and get on with your day. All that’s missing is a heart-rate sensor, but then you’ve probably got a heart rate monitor, fitness tracker or a smartwatch for that.

Price and release date

Originally launched by Xiaomi in 2020, the Xiaomi Mi Body Composition Scale 2 is a follow-up to the original Mi Body Composition Scale from 2018. It’s available from the Mi website for £24.99 (about $35 / AU$50), and at a lower price from third-party retailers.

Be sure to look for the Xiaomi Mi Body Composition Scale 2 (model number 2XMTZC05HM) and not the Xiaomi Mi Smart Scale 2, which is a slightly different product.

Design

• Minimalist design
• Weighs 1.7kg
• Uses 4x AAA batteries

The Mi Body Composition Scale 2 is all about minimalism. Covered in reinforced glass, its 300 x 300 x 25mm chassis has rounded corners and is shiny, but doesn’t attract fingerprints. Its sensible, simple design continues with a large – but not massive – LED display up the top that displays your weight, and only your weight, in white characters. When it’s not doing that, it’s completely invisible. In the centre of the product is a ‘Mi’ logo, and at each corner are steel sensors.

The scale communicates with a smartphone via Bluetooth 5.0 and is powered by four AAA batteries, which are included in the box alongside an instruction manual in Chinese characters. We would have preferred a built-in battery, though Xiaomi suggests they’ll power the Mi Body Composition Scale 2 for about 12 months.

Performance

• Well weighted and steady
• High-precision pressure sensors
• Measures your balance, but not heart rate

The Mi Body Composition Scale 2 is all about its high-precision pressure sensors. Step on to them and your weight is shown within a second, and if you try to weigh yourself a few minutes later you’ll get exactly the same weight. 

Crucially, the Mi Body Composition Scale 2 doesn’t move when you put one foot on it, unlike some much smarter scales that overlook the basics. However, you do need to remove your socks to get anything other than your weight; the scale needs skin contact to get body composition data.

You can also get a score of your balance by standing on the scale on one leg for a few seconds.

What it does lack is Wi-Fi, but that's less of an issue than it might sound. A lot of bathrooms suffer from a weak wireless signal (after all, no one ever puts a router router by the toilet), so the Mi Body Composition Scale 2 using Bluetooth to communicate with a smartphone makes a lot of sense.

Companion app

• Simple, clear figures and charts
• Calculates body age and ideal weight
• Syncs with Apple Health, Google Fit and Samsung Health

Though you can just use the Mi Smart Scale 2 as a digital scale that displays your weight, there’s a lot more going on under the hood that is only revealed if you use it to funnel data into the Mi Fit app. Each time you weigh yourself, it takes a host of measurements and sends it all to the Mi Fit app via Bluetooth, which then uploads it all to the cloud. It then syncs with Apple Health, Google Fit and Samsung Health.

Although the Mi Fit app also includes things like walks, runs, calories used etc, you can just use it to track your weight. There’s plenty of bioelectrical impedance analysis here, including body fat, muscle, protein, water, bone mass, visceral fat and a score for your basal metabolic rate (the number of calories required to keep your body functioning at rest).

It also offers your body age and your ideal weight (based on your height, age and BMI, “so you don’t have to lose weight recklessly and become excessively thin for the sake of aesthetics” according to Xiaomi. To get that kind of analysis you must tell the app your gender, date of birth and height.

First reviewed September 2021

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The Eufy Smart Scale C1 is one of the most affordable smart scales you can buy right now – and in our tests, we found it was also the best. This stylish little scale delivers truly impressive specs for the price, which gave it the edge over bigger names like Garmin and Fitbit, earning its place as the best smart scale of 2021.

Eufy is well known for its smart home devices, including vacuum cleaners and robot vacuums, as well some of the best video doorbells – but even if you don't recognize the name, you probably know its parent company Anker, which makes some of our top-ranking wireless headphones and speakers. You'd expect its smart scales to be among the best too – and you'd be right.

Smart and simple

Some smart scales are a hassle to set up, requiring a complex registration process and multiple passwords – but not this one. In fact, we were amazed how quickly it was ready for us to step on and start measuring our weight. You'll need to download the appropriate smartphone app and make a user account, but this takes just a few moments, and once it's done the scale will be detected and connect to your phone via Bluetooth almost instantly.

The scale will recognize you automatically as soon as you step aboard, and your name will be displayed on the bright LED display, which is easy to read while you're standing. There's no Wi-Fi connectivity, but don't worry; the scale can store up to 100 weight readings, and will sync them for you when your phone is within Bluetooth range.

The Eufy Smart Scale C1 supports up to 16 users, which is unusual (most smart scales max out at eight), and means it's suitable for a big household, or even a sports team.

Eufy's app is thoughtfully designed too. The scale uses the EufyLife app rather than EufyHome, which is for smart home devices like robot vacuums, but you can use the same account login details for both. All your data is clearly presented, with your current weight on the home screen and more detailed body composition stats in a series of tiles.

Each tile is color-coded to show whether your stats are high, normal. or low, and tapping them reveals extra information about what the data actually means – something not all smart scale apps provide.

We found that the measurements from the Eufy scale almost exactly matched those from the body composition scale in our gym. Both these scales use bioelectric impedance to estimate the mass of lean tissue and fat in your body. This isn't as accurate as a DEXA scan, for example, but can be useful for tracking changes over time. 

Weighing up the competition

Despite all this, the Eufy Smart Scale C1 is one of the most affordable smart scales around, costing just $35.99 / £35.99 (about AU$50) – and can often be found for even less at retailers like Amazon.

If you own a Garmin or Fitbit device, you might prefer to stick with a scale like the Garmin Index S2 or Fitbit Aria Air, which will import your weight and body composition into the appropriate mobile app automatically. However, typing in the figures yourself doesn't take long, and for such a big saving, you might decide it's worth the extra effort.

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Before you invest in the Fitbit Aria Air, you should know that unlike other Fitbit smart scales, it doesn’t use a small electrical current to estimate your body composition (including far, muscle and bone mass) – a method known as bioimpedence. This means you’ll get a less complete picture of changes to your body, but means it’s safe for people with implanted devices such as pacemakers.

Instead, the Fitbit Aria Air measures weight (in imperial or metric units), and calculates your BMI using the height entered when you created your Fitbit account. This is synced immediately with the Fitbit mobile app, where you can track changes over time and see how close you are to meeting your target weight. It also makes it easy to see how any lifestyle changes, such as increased exercise or improved sleep patterns, may have affected your weight.

The Fitbit Aria Air connects to your phone via Bluetooth, and has no Wi-Fi connectivity. This means it’s very quick and easy to set up, with no need to enter the password for your home network, but your phone will need to be within Bluetooth range for your data to sync.

If you own a Fitbit smartwatch or fitness tracker, and aren’t particularly interested in the details of your body composition, then the Fitbit Aria Air is a good choice. It’s solidly built and easy to use, making it easy to get into the routing of weighing yourself regularly.

However, it’s not your only option. There are third-party scales (such as the Eufy Smart Scale C1) that are also excellent, and sync data with the Fitbit app as well. The setup isn’t quite as straightforward, as you’ll need to connect Eufy and Fitbit apps together, but if you’re on a budget then it’s a cheaper option well worth considering.

Price and release date

The Fitbit Aria Air was released in December 2019, and costs $49.95 / £49.99 / AU$99.95 direct from Fitbit.

For context, that's roughly the same as the FitTrack Dara (a Bluetooth-only body composition smart scale) and around twice the price of the Wi-Fi-enabled Withings Body+ body composition scale.

Design

The Fitbit Aria Air is available in black and white, and like almost all smart scales, has a platform topped with toughened glass. In our tests, this seemed particularly prone to fingerprints. It’s water-resistant, so you can wipe it with a dry towel if it gets wet in the bathroom, but we found marks were stubborn even when rubbed with a microfiber cloth.

It takes three AAA batteries, which are supplied. Its platform is large for a smart scale, measuring 12.8 x 12.8in (slightly bigger than the Withings Body+), Unlike some other scales, there are no marking to show the best place to position your feet, but as the scale doesn’t use bioimpedence, this shouldn’t be a problem.

We were surprised how heavy the Fitbit Aria Air was. It weighs 3.9lb (1.7kg), which isn’t much less than Wi-Fi scales like the Garmin Index S2, and much less than the Eufy Smart Scale C1 Bluetooth scale. Fitbit advises always storing the scale upright, so you’re unlikely to be moving it often, but it’s something to bear in mind if space in your bathroom is limited.

User experience

Because the scale doesn't track body composition, it's unable to identify you unless your phone is within Bluetooth range. Step aboard without a connection and you'll see your weight, but your data won't be synced. It's not stored on the scale itself, as there would be no way to pin it to a particular user.

This could be inconvenient if you're not in the habit of taking your phone into the bathroom in the morning, but does mean there's no limit to the number of people who can use the scale. Most smart scales only support between four and 16 users, but the Aria Air has no such cap, provided each person has a Fitbit account.

Weight is shown on the bright LED display as soon as you step on, and provided you have the Fitbit app open on your phone, it will appear there straight away. Unlike Salter's Bluetooth smart scales, there's no need to tap a button to initiate the syncing progress. 

The Fitbit app will show changes to your weight and BMI over time (though it's a shame the same data isn't displayed on the scale's screen as well). Usefully, the app also shows 'idea' weight and BMI ranges, which adds useful context to the data, and is something missing from many smart scale apps.

The data presented was consistent across multiple weigh-ins (though Fitbit advises that you may need to weigh yourself a couple of times if you've moved the scale since it was last used), and lined up with that from the professional scale at our gym. As with any scale though, it's recommended to use the Fitbit Aria Air on a hard floor for the most accurate readings.

It's also worth noting that Fitbit adds new features to its smartphone app regularly, so it's possible that new tools that use your bodyweight or BMI might be developed in the future. This is a robust, well built scale that lacks frills, but could be a good investment if you're committed to the Fitbit ecosystem.

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The Withings Body Cardio smart scale can now measure your 'vascular age', giving you an insight into the health of your arteries and heart. The firmware update is rolling out now, making it easier to monitor your cardiovascular wellbeing.

Most smart scales measure your weight and body composition using bioelectrical impedance, and send this data to a mobile app on your phone via either Wi-Fi or Bluetooth. The scale sends a very small current through your body and measures the resistance as it passes through different tissue types. They then use algorithms to estimate the mass of bone, fat, muscle and water in your body.

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The Withings Body Cardio scale goes a step further, also measuring heart rate and pulse wave velocity when you step onto the platform. Pulse wave velocity is an indication of how flexible your arteries are. Stiffer arteries suggest higher blood pressure, and poorer cardiac health.

The new vascular age metric is based on pulse wave velocity, but puts this data into a more accessible format, using it to estimate the 'age' of your heart. Step onto the scale and you'll see a simple 'optimum', 'normal' or 'not normal' rating on its display, and within the app.

Finger (or toe) on the pulse

The Withings Body Cardio is one of the most expensive smart scales on the market, with a retail price of $149.95 / £108.29 / AU$249, but when we tested it we were impressed by the depth of data available in its companion app, which also provides tips you can use to help improve your health.

This firmware update makes this data even more accessible, putting the cardiovascular health measurement into simple terms that are easier to understand rather than giving raw numbers.

It won't be for everyone (if you need a budget smart scale then the simpler Eufy Smart Scale C1 or FitTrack Dara will fit the bill better), but if you're interested in more than just weight loss this new feature makes the Withings Body Cardio easy to recommend.

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The Withings Body+ is a body composition smart scale that gives you the best of all worlds. It's affordable (much more so than the top-end Withings Body Cardio), it has both Bluetooth and Wi-Fi connectivity (whereas the Withings Weight & Body BMI scale just has Bluetooth), and it gives you accurate, consistent readings synced with an excellent, user-friendly app.

It's a particularly good smart scale for families, with support for up to eight users, each of whom is recognized automatically. There's a large non-slip platform with live guidance to help you stand in the right position, and the display is bright and clear. 

Data syncs with the Withings Health Mate automatically with no extra input, and can be pooled together with information from apps like Google Fit, Apple Health and MyFitnessPal so you can see all your health and activity metrics in one place.

It's not just numbers either; the app also provides expert advice to help you understand what it all means in practical terms, and guide you towards healthier lifestyle choices (not only weight loss).

If you're on a tight budget then a Bluetooth-only scale like the Eufy Smart Scale C1 might be a better choice, but you'll be hard pressed to find a better smart scale with Wi-Fi connectivity. 

Price and release date

The Withings Body+ was released in 2017 and costs $99.95 / £74.96 / AU$179, putting in the middle of the company's range of smart scales.

Design

The Withings Body+ has a toughened glass platform, with marking to help you position your feet correctly. If you're not in quite the right place, arrows on the scale's display will guide you into the optimal position. As with Withings' other scales, the platform is quite large, measuring 12.8 x 12.8in and the bright display measures 2.4 x1.6in.

Unlike the Withings Body Cardio, the Body+ scale has conventional feet underneath, with a textured non-slip surface to avoid marking your floors. Like the vast majority of electric scales it's only suitable for use on hard floor, but carpeted bathrooms are a rarity so that's unlikely to present an issue.

The scale takes three AAA batteries (included) and comes with a two-year warranty. Withings also offers a 30-day returns policy if you're not happy.

User experience

Install the Withings Health Mate app (available for iPhone and Android devices) and create an account, then turn on the scale and follow the in-app instructions to connect it via Bluetooth. Once that's done, you'll be prompted to add the scale to your home Wi-Fi network. This isn't an essential step, but means the scale can sync your data when your phone is out of range.

When we tested the scale, there was no need to carry out a firmware update, but the Wi-Fi connectivity means it would be possible to receive any important feature upgrades or safety patches in the future.

Once that's done, select the data you'd like to see each time you weigh in, which can include weight, body fat, muscle, water, steps (synced from third-party apps like Google Fit or Apple Health) and even the weather.

You're then ready to step on. Your weight will be shown almost instantly, and after a couple of seconds the scale will cycle through your elected stats. There’s no need to select a user ID before weighing; the scale will recognize you based on your body composition, and your name will appear on the display to confirm this.

Body composition data is synced to the app automatically, and will appear on the app's homescreen with options to drill down for further information. More on that in a moment.

In our tests, data was consistent throughout multiple weigh-ins, and matched that taken by other Withings scales (including the top-end Withings Body Cardio). There were no unexpected peaks or troughs, which we've experienced with some of the cheaper smart scales we've tested, and composition scores were in line with those from the scales at our gym.

The scale supports up to eight users, making it a good choice for large households (the Body Cardio only supports four), and the display is bright and easy to read. All different stats are presented clearly, with icons where appropriate (steps are represented by footprints, for example), which is a thoughtful addition.

Companion app

The Withings Health Mate app is one of the best we've seen for syncing, managing and tracking data from a smart scale. Your current weight is shown clearly on the app’s homescreen, along with a chart of your last seven weigh-ins so you can easily track trends. You’ll also be able to see your current step count at a glance, and stats for recent workouts.

Workout and step data is gathered by third-party apps like Apple Health or Google Fit, and seamlessly imported.

To see your detailed body composition data, tap the ‘Dashboard’ link. Details from your last weigh-in are presented, along with an arrow to show whether the general trend for each metric is up, down, or stable. It’s well designed, and a handy way of checking progress without delving deeper into the numbers if you’re in a hurry.

You’ll see Health Insights in the Withings Health app, letting you know if you should make any changes to your goals (if they appear too high or too low), or if you’re on the right track. You can tap on these for advice from health experts. Alternatively, you can choose to unsubscribe if you’d rather focus on the numbers.

Tapping on any measurement will reveal a more detailed chart of your changing body composition over time. Tap any of these charts for detailed insight into what that particular metric means, why you should measure it, and how it’s calculated by the scale and app. There’s a lot more information than you’ll find in most fitness apps, and it’s presented in plain English, which adds important context to the raw figures.

A blue band on each chart that represents the recommended ranges defined by the World Health Organization, so you can see where your numbers fit, but you can choose to turn this feature off if you prefer (which you might choose to do if you’re a bodybuilder or athlete, for example).

The app also provides advice on when and how to weigh yourself (ideally at the same time each day, 30 minutes after waking up, and just once or twice a week).

You can choose to log your heart rate, blood pressure and food intake as well. The only omission we can see is a lack of tools for logging your menstrual cycle, which can have a noticeable effect on water retention and therefore overall weight during the course of the month.

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There’s more to health than just weight, and the Withings Body Cardio smart scale is designed to help you track improvements in your cardiovascular fitness over time, as well as your body composition.

Like most smart scales, the Body Cardio uses bioelectrical impedance to measure the mass of different tissue types, including bone, muscle and fat. That's not all, though; it also measures your heart rate and pulse wave velocity, which can be good indicators of your overall wellbeing.

A lower heart rate is typically an indicator of better fitness, so if you see that your numbers are trending down, it's a good sign that you're on the right track. Pulse wave velocity, meanwhile, indicates how flexible your arteries are (we'll go into the details below). Stiffer arteries mean your heart has to work harder to pump blood around your body.

All this data is synced wirelessly to the Withings Health Mate app on your phone via Bluetooth or Wi-Fi, where it's visible alongside workout data and step counts gathered by third-party apps like Google Fit, Samsung Health, and Apple Health.

In addition to aggregating all this data, the app also gives you an in-depth explanation of what it all means, and provides helpful suggestions for lifestyle changes you can make to improve your numbers.

It's a well designed package that will serve you well if you're interested in not just losing weight, but improving your overall fitness. The Body Cardio scale is quite expensive though, costing twice as much as smart scales that only monitor body composition. 

Price and release date

The Withings Body Cardio was released in May 2018, and costs $149.95 / £108.29 / AU$249. 

Design

Like most smart scales, the Withings Body Cardio has a glass platform that provides a robust non-slip surface to stand on. 

There are no feet underneath; instead, the scale has a type of two-layer design with a flat aluminum base that Withings says makes it "the thinnest, most stable scale on the market", and means it's suitable for use on all floors, including carpet. It's a novel design, but one that makes it noticeably heavier than other smart scales at 2.6kg.

If you need a scale to travel with you might be better off with something like the FitTrack Dara, which is more compact and weighs just 1.4kg.

Whereas most smart scales use three or four AA batteries, the Body Cardio scale is charged via a micro USB port on the side. Charging progress is displayed on the screen once it’s plugged in. It's an unusual choice, but one that we appreciate due to the reduction in waste from old batteries.

We also like the positioning of the power button on the side of the scale rather than the base; particularly since the scale is quite weighty. Once the scale is charged and you’ve installed the smartphone app, hold this button for three seconds and you’re ready to get started.

The display is quite large, measuring 2.4 x 1.6in, and makes good use of graphics to represent complex information.

User experience

Pairing your with Withings Body Cardio scale with your phone is a simple process using the Health Mate app. You'll first be prompted to connect the two via Bluetooth, after which you'll be given the option of connecting the scale to your Wi-Fi network as well. This isn't mandatory, but is recommended so your data can sync when your phone isn’t within range.

Once that's done, you can choose which stats to see on the scale each time you weigh in, including weight, body composition (muscle mass, water, fat etc), weather, and heart rate and pulse wave velocity.

Bear in mind that heart rate typically increases immediately after standing, so it's a good idea to wait a moment and step onto the scale after it's settled.

It takes five weigh-ins to gather enough data to calculate your pulse wave velocity (you'll see how many weigh-ins are still to go each time you step on). Your optimal pulse wave velocity depends partly on your age, and the app will show you whether or not your results are optimal for your age group.

If your pulse wave velocity is particularly fast, it's a sign that your arteries are deteriorating faster than they should, and you may be at risk of hypertension. A slower velocity indicates that your heart and blood vessels are in good health.

When you step on, the scale will immediately recognize you based on your biometric data, and display your name to confirm it. It will then cycle through the data you've chosen to see each time you weigh in.

If you're not standing in quite the right position, small arrows will appear to guide you into the optimal place on the platform.

Bear in mind that the extra cardiovascular measurements mean you'll need to stay on the platform for a little longer than you would on a typical smart scale. The Withings Body Cardio only failed to measure our heart rate once, and that was because we moved during the weighing process. Stand still and you shouldn't run into any issues.

The scale can track data for up to eight users, making it a good choice for larger households (the Salter Mibody Digital Analyser, by contrast, can only track up to four people). If it's unable to sync wirelessly straight away (via either Bluetooth or Wi-Fi) it can store up to 16 readings.

Composition and weight measurements were consistent across multiple weigh-ins, and matched those from other Withings scales, showing the same degree of change over time.

Companion app

The Withings Health Mate app is clear and well designed (much more so than the equivalent app from rival Salter).

Not only does the app sync information on weight and cardiac health from your scale, it can also import data from third-party apps like Samsung Health, Apple Health and Google Fit, allowing you to see your activity details and health metrics all in one convenient place. You'll be prompted to connect any of these compatible apps when installing Health Mate, and the process is quick and seamless.

Body composition measurements are all shown in clear line graphs so you can track changes over time, and each one is accompanied by a 'Learn more' button that you can tap to discover exactly what each reading means. Some smart scale apps only give you raw numbers, and this extra detail is very useful for putting them into context.

The app will suggest lifestyle changes that can help improve your fitness stats, and you can choose to join programs that will guide you through the process of developing better habits.

If you're in a hurry, you can see how each of your body composition metrics is trending at a glance thanks to arrow icons in the app's dashboard. When you have time to delve into more detail, you can choose to view numbers as weights or percentages, set goals, and learn the best ways to achieve them.

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The Mibody Digital Analyser Bathroom Scale measures not only weight, but also body composition (including fat, muscle, bone and water mass) using bioelectrical impedance. This data is then synced with Salter's smartphone app via Bluetooth, provided your phone is within range.

In our tests, the smart scale’s measurements were consistent, and composition and heart rate scores were in line with those recorded by professional gym scales.

The scale is also well designed, and would be a good option for anyone who finds bathroom scales tricky to use due to balance or vision difficulties. The non-slip platform is larger than average, and the display is bright and legible. The scale is easy to carry as well, and surprisingly light for a smart scale.

Sadly, Salter’s app doesn’t do justice to its hardware, and is sorely in need of an update to bring it into line with modern expectations. Data doesn’t sync automatically, many metrics are hidden away by default, and the overall look is unappealing.

A future software update would vastly improve the experience, and if Salter overhauls the app then this scale would become easy to recommend, but as things stand it doesn’t do justice to the hardware.

Price and release date

The Salter Mibody Digital Analyser Bathroom scale was released in March 2016 and costs £59.99 / AU$119.95 (about $80). 

Design

Like most smart scales, the Salter Mibody Digital Analyser has a glass platform that provides a tough, non-slip surface. A pair of metal strips provide reliable contact between you and the scale’s sensors.

The scale is clearly designed with accessibility in mind. Its platform is quite large, measuring 30 x 30cm, which makes balance easier to anyone who’s a little unsteady on their feet. It also has a bigger than normal display (76 x 51 mm), which is easily read when standing upright. It takes three AAA batteries, which are supplied.

Unfortunately, the design isn’t completely hands-free. You can quickly check your weight without using the scale’s three buttons, but in order to take body composition readings and have them sent to the Salter app on your phone, you’ll need to tap the central button and then use the left and right arrows to select your user number.

It's a minor inconvenience, but if you're pressed for time then it's one that you'd probably prefer to avoid.

Underneath, non-slip rubberized feet provide good grip and prevent the scale scratching your bathroom floor. Non-slip rubberized feet to prevent scratching your tiles, laminate or linoleum. The box also includes hard feet for use on carpets, but carpet pile tends to impair the accuracy of electric scales, so we’d be inclined to stick to hard floors wherever possible. 

User experience

Setting up the Salter Mibody Digital Analyser is a straightforward process. Simply install the Salter app (available for iOS and Android) and tap the menu icon at the top right of the app to get started. Select ‘Add device’, then power on the scale, select ‘Add device’, and hold the central button for five seconds to pair the two via Bluetooth.

Up to four users can use the same scale, which will be fine for many households, but is a little disappointing since many similar scales can store data for six or even eight different people. It’s not possible to assign names to different users, which is slightly annoying. Instead, everyone will have to memorize a number, and select it each time they weigh in.

To measure your weight and body composition, tap the center of the scale and wait for it to display zero, then use the buttons to select your user number and step on. After a moment your weight will be displayed on the screen, followed by your composition stats.

The screen is easier to read than that of the Body Curve scale; it uses a conventional rather than reverse LCD display, with plenty of contrast and large digits. You can choose to switch between units using the scale’s three buttons, which is convenient.

The scale has a dedicated athlete mode, but there’s no separate pregnancy setting for monitoring the growth of your child. For that, you’ll need to opt for a scale like the Withings Body+.

Companion app

Sadly, like the Salter Curve Bluetooth Smart Analyser Bathroom Scale, the Mibody Digital Analyser is a well designed piece of hardware that’s let down by a dated app that’s trickier to use than those from Withings, Garmin and Fitbit.

In order to get the most out of your new Salter scale, you’ll need to spend time configuring the app’s homescreen. This shows your vital stats in a series of round bubbles, which you can tap to reveal a graph of your progress over time. However, only a few of these bubbles are visible by default, meaning lots of the interesting information gathered by the scale is hidden away. In order to see detailed stats on your body composition, it’s necessary to tap the menu icon on the top right, then select Add Icon > Analyser Scale and check all the available options.

Syncing data with the app is also tricker than we’d like. Whereas most other scales sync data automatically when a Bluetooth connection is available, Salter’s app requires you to initiate the process manually by tapping the menu button and selecting Add Data. It’s extra steps like this that make this scale a tough sell; the extra time all adds up, particularly when you’re in a hurry first thing in the morning.

The charts aren’t ideal either. If all your readings for weight, fat or muscle are within the ‘Normal’ zone, they won’t show you how close you are to being under or over the recommended levels.

We do, however, appreciate the trend line presented on the various charts, which helps you see past everyday fluctuations in weight caused by things like water weight. It’s a small touch, but a helpful one if you’re aiming to improve your fitness in a steady, healthy way.

First reviewed February 2020

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One-minute review

This is the simplest of Withings' three smart scales. Unlike the more sophisticated models (The Body+ and Body Cardio), it only measures weight and BMI, not body composition, but there are still lots of reasons to consider it.

The scale itself is thoughtfully designed, with features including a large platform, a high contrast display, and directional arrows to help you stand in the correct position. Once it's set up, minimal interaction is necessary; just step on, and your weight and BMI will be transmitted to your phone automatically.

The Withings Health Mate app is excellent, not least because of its integration with all the major health and fitness apps, including Fitbit, Samsung Health, Google Fit and Apple Health. Data recorded by any of these apps can be imported seamlessly, so you can see your activity levels and workouts right alongside data from the scale.

If you want to keep tabs on your weight but aren't concerned about the nitty gritty of fat and muscle composition, this scale is a well designed tool that's easy to work into your morning routine.

Design

Like most smart scales, the Withings Body Weight & BMI Wi-Fi Scale has a toughened glass platform and rubberized feet to avoid scratching your floor.

This scale has a particularly minimalist design with no clear markings, but is still easy to use thanks to some thoughtful touches. Its platform is large, measuring 33 x 33mm, which is helpful for anyone who struggles with balance, and if you’re not standing in quite the right position, small arrows in the corners of the display will show you where to move to get an accurate reading.

The display is also big, and its high contrast makes for easy reading even in poor lighting. It takes four AAA batteries, which are included.

Performance

Setting up a Wi-Fi smart scale is always a little more complicated than configuring a Bluetooth-only one like the Eufy Smart Scale C1, but Withings makes it as straightforward as possible.

Install and launch the Health Mate app (available for iOS and Android), then turn on the scale by holding the button on the underside for three seconds when prompted, then log into your account if you already have one, or create a new one if not

You’ll then be prompted to enter your Wi-Fi password. You can skip this step and use Bluetooth instead, but using Wi-Fi means you can sync your data when your phone is out of range, see weather reports on the scale, and receive firmware updates. Speaking of which, the scale is likely to require a sizeable update during the initial setup, so make sure you allow time for that.

You can choose which data you’d like to see on the scale when you use it, including weight, BMI, weather (useful first thing in the morning), weight trend, and steps if you've connected a fitness tracker or third-party fitness app to Health Mate. More on that shortly.

If you’re intending to lose weight you’ll be asked to set a goal weight, a pace at which you’d like to lose it. This step is optional, and can be skipped if you're simply aiming to maintain a healthy weight.

You can create profiles for up to eight users, and when you step onto the scale, it will select the correct one automatically.

The scale also offers pregnancy and baby modes. We haven’t been able to test these, but they are intended to help you check your baby’s growth. Some other scales have a dedicated mode for children, but few have a dedicated tool for expecting mothers and new parents, and it’s a welcome addition.

In our tests, the Withings scale gave almost identical results to more expensive devices, and showed the same daily fluctuations. Results were consistent when weighing several times in quick succession.

Companion app

The Withings Body BMI Wi-Fi Scale syncs with the Withings Health Mate app on your phone. If you have another Withings device, like the Withings ScanWatch or Sleep Analyzer, that data will all be pooled together in one convenient dashboard.

The Health Mate app also integrates seamlessly with the Google Fit, Apple Health or Fitbit app on your phone, so even if you don’t have a Withings fitness tracker, you can see your daily step count and week’s workouts all in one location. Just grant permission when prompted, and all your data will be transferred automatically. It’s refreshingly straightforward, and makes good use of available information.

Your weight is plotted on a graph, which you can pinch to zoom in and out. Your goal weight (if set) will be clearly presented, along with recommended weight ranges. Not all apps give you this information, and it provides useful context beyond raw numbers.

The app’s homescreen will show Health Insights letting you know if your weight is stable or changing, whether it’s healthy for your height, and whether you should consider making any lifestyle changes. You can also choose to read advice from a certified fitness and nutrition coach if you’re trying to lose weight, to help you do so in a healthy and sustainable way.

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One minute review

We've tested many smart scales, and the Eufy Smart Scale C1 is easily one of the best. Not only does it measure a wide range of health metrics, it does so with the absolute minimum of fuss so tracking your health takes only a couple of seconds every morning.

Results were consistent, and body composition scores were in line with what we'd expect based on our measurements from commercial scales.

We found the Bluetooth connectivity reliable, and results synced with the app almost instantly when the phone was within range (the scale can store up to 100 readings if you don't have your phone to hand).

The user experience is what really sets the Eufy Smart Scale C1 apart from the competition. Once the initial setup is complete, it's no more effort to use than a standard electric bathroom scale, which is an impressive feat.

It's an excellent smart scale, and is easy to recommend – especially at such an affordable price.

Design

The Eufy Smart Scale C1 has a sleek glass platform, and is available in black, white and blue. While many smart scales hide their contacts away beneath the glass, here they're clearly visible, serving as a useful guide to help you position your feet correctly and ensuring a stable connection.

The platform is a little smaller than most smart scales, measuring 28 x 28cm, which might make it slightly harder to use if you have poor balance, but its display is bright and easy to read while standing, even in poor light.

You can switch between imperial and metric units using a switch on the underside. The scale takes three AAA batteries (supplied), and its feet have a non-slip rubberized texture to protect your floor.

Performance

Setup is extremely straightforward - enter your name, height and gender, and when prompted by the app, press the button under the scale to pair it. That’s it - you’re ready to step on. It’s quicker and less hassle than any other pair of scales we’ve used.

Open the app, step on with bare feet, and your stats will be shown on the scales’ display straight away. The scale will use your measurements to determine the correct profile to use and data syncs with your phone immediately.

If you don't have your phone to hand, the scale can store up to 100 readings to sync with it later.

It's the small differences like this that set this scale apart from rivals like the Salter Curve, which requires you to select your profile and import data manually, which makes all the difference when you're getting ready in the morning and don't want to spend any more time than necessary.

The Eufy scale uses bio impedance to measure different tissue types, and in our tests the results closely matched those from the scale at our gym. They were also extremely consistent; stepping off the scale and back on resulted in exactly the same reading each time, whereas some other scales show slight variation each time.

Companion app

If you the Smart Scale C1 uses the EufyLife rather than the EufyHome app, but if you already have smarthome devices from the company, you can log in using the same email address.

Create an account, enter some basic profile information so the app can calculate your BMI (gender, age and height), and you're ready to start weighing. Just step on the scale and everything will happen automatically. Of all the smart scale apps we've used, it's the most hassle-free.

You’ll see results for BMI, body fat percentage, water, muscle mass, bone mass, BMR (basal metabolic rate - the number of calories your body uses per day at rest), and visceral fat. The app also shows you the weight of each tissue type in your body, which isn’t a feature we’ve seen before, but makes for interesting reading.

Tapping on any of these measurements will show your position on a scale from low to high, so you can see how your body composition compares with typical healthy readings, together with how that particular metric affects your health and what you can do to change it. Everything is clearly laid out and easy to understand.

We'd appreciate trend lines on the charts to reflect general progress towards the goal weight without everyday fluctuations, but this is a small complaint.

Not a fan of the Eufy app? No problem - you can also sync your data with a wide range of third-party apps, including Fitbit, Apple Health and Google Fit.

It's easy to see where you fit into the range from over- to underweight, helping you choose a suitable, healthy goal weight.

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One-minute review

The Salter Curve Bluetooth Smart Analyser is a body composition smart scale, which means it uses bio impedance technology to differentiate between different types of tissue - body fat, water, muscle and bone. It can also calculate your BMI and BMR (basal metabolic rate) and sync all the data with your phone so you can track your progress.

In our tests, the scale itself performed well; its measurements were generally very consistent, and closely matched those from the commercial body composition scales at our gym.

It's also well designed from an accessibility perspective, with clearly marked areas to position your feet, and a bright, clear display that's easy to read when standing. Its platform is slightly larger than usual, topped with robust toughened glass, and the rubberized feet fitted as standard prevent slipping on hard floors (carpet feet are also included, but using bathroom scales on carpet is generally not recommended),

Unfortunately the Salter Curve is let down by a dated app, which it very out of keeping with the smart, modern design of the scale itself, and small inconveniences here and there mean we’re inclined to recommend a scale from the likes of Withings, Garmin or Eufy instead.

Design

The Salter Curve scale is available in black and white, and has a premium feel with a toughened glass surface. Clearly designed with accessibility in mind, the platform is a little larger than average (306mm x 336mm, with areas marked to help you position your feet correctly. The reverse LED display is bright and easy to read while standing. It takes three AAA batteries (included).

It’s interesting to note that the scale comes with swappable feet for hard floors and carpet; most electric scale manufacturers advise against using the scale on carpet, as the pile absorbs some of your weight and can make the reading inaccurate.

Performance

We had one anomalous reading at the start when the scale miscalculated our body fat, but otherwise the Salter Curve scale was one of the most consistent we’ve tested, producing the same measurements repeatedly when we re-weighed ourselves several times.

Other than that initial blip, the body composition scores also impressed us, closely matching those from the commercial scale at our local gym.

We had no issues establishing or maintaining a Bluetooth connection either, and because the scale doesn't use Wi-Fi, setup is fast and straightforward. Up to eight users can connect to a single scale, which is handy for families, though it's a shame you can't assign names to be displayed on the scale; instead, each user simply has a number.

Stepping straight onto the scale will allow you to see your weight on the display, which is useful for quick check-ins. If you've moved the scale since you last used it, you'll need to tap it with your foot to calibrate it before using it.

For your weight and body composition data to be taken and sent to your phone, tap the center of the scale with your foot, then tap the central button below the display and use the arrow buttons select your user number. Most smart scales will detect which user's phone is connected and select the correct profile automatically, so this extra step is a little frustrating.

Once the display shows zero, step on and the scale will display your full stats. You can then open Salter’s app, tap the menu button at the top right, select ‘Add data’ and tap the plus arrow. Most smart scales will send this data to a connected phone automatically, so again, it's disappointing that this extra step is necessary.

Companion app

Unfortunately the Salter MiBody smartphone app looks very dated, and lets down this otherwise good scale.

As with any smart scale, you'll need to begin by setting up an account and entering your height and gender so the app can calculate your BMI. Once that's done, you can set a target weight to aim for, import body composition data, and enter body measurements manually if you'd like to record more comprehensive metrics.

Your data is presented in icons on the app’s homescreen. You’ll only see weight and body fat by default; to view the scale’s other readings, tap the menu icon at the top right and select ‘Add icons’.

Tapping any icon will show a graph where you can track your progress over time. You can zoom in and out by pinching, and we appreciate the graph’s trend line, which helps you overlook small daily fluctuations caused by water and food weight.

However, it’s a shame that the graph’s Y axis starts at your lowest measurement and ends at your highest. If your measurements all fit within the ‘normal’ range, for example, you can’t see how close you are to being under or overweight, because the boundaries aren’t shown.

If you have an iPhone, you can sync your data with the Apple Health app, which has a cleaner, more accessible interface. 

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Fitbit Aria brings the futuristic world of The Jetsons one step closer by computerising the humble weighing scales.

After connecting it to your home wireless network, your weight is recorded on your Fitbit account as well as being shown on the scales.

Its glass surface contains electrodes that send a pulse through your body to measure its fat percentage, from which it can calculate your Body Mass Index (BMI), a far better indicator of overall health than weight alone.

All this information can be viewed on the Fitbit Dashboard through your web browser or a dedicated iOS app, and up to eight people can register an account and share the same set of scales.

The Aria is fun to use. It's great to see your weight and BMI tracked through ongoing progress charts, and you can earn award badges by setting targets and meeting them.

Yet two flaws keep it from greatness. Firstly, it's extremely fussy about where it's placed. On a carpet, or even springy floorboards, it's likely to give inaccurate and inconsistent results; it must be used on a concrete floor.

Secondly, although the Aria can be set to give weight in stones and pounds, when the information is viewed on the browser tracker, it's displayed in stones to one decimal place. As there's 14 pounds in a stone, 11st 7lbs (for example) is eleven and a half stones, and displayed as 11.5 stone. This can be confusing.

If you're looking to lose weight and improve your general fitness, Fitbit Aria is highly recommended. Just make sure you've a suitable concrete floor to use it on before buying.