Apple's smartwatch remains firmly up its sleeve. Yes, there have been plenty of iPhone 6 spy shots, but iWatch image leaks haven't surfaced despite what you may think.

Everything you see online is an iWatch render. Don't feel too duped, though. Many of the iWatch concepts are based on anonymously sourced reports of its display and specs.

Apple iWatch

The latest rumors indicate that the iWatch will end up with a 1.6-inch display, which is slightly larger than the square-shaped iPod Nano 6G, and a two bigger screen options at 1.8 inches.

Previous iWatch speculation revolved around a display at a much larger 2.5 inches measured diagonally and screen technology being made by LG.

LG is busy with its own Android Wear smartwatch, the LG G Watch, but the manufacturer has supplied Apple with Retina Displays for previous iPhones, so that part isn't not too far-fetched.

It's the 2.5-inch screen that has us collectively scratching our heads. The Samsung Gear Live is a large enough at 1.63 inches and the LG G Watch is even bigger at 1.65 inches.

Apple already makes a device with a 2.5-inch display, the iPod Nano 7G, but it's difficult to imagine the company crafting the same dimensions onto wrists without some of that Apple "magic."

This could be why we're hearing that the iWatch could come in two different sizes that conform to bigger and smaller wrist sizes.

There's also a chance that Apple may compete directly with the stylish Moto 360 smartwatch that features a stunning circular watch face.

The company could, alternatively, go with a more fitness-focused approach with an Apple iBand that's modeled after the Nike FuelBand SE, but its smartwatch features would be limited.

Specs

That LG-made iWatch display may be locked behind sapphire glass to protect it from the sort of nicks and bumps that comes with a constantly worn wearable.

Sapphire glass is the same tough-as-nails material that's supposedly being used in the iPhone 6 in an effort to replace Gorilla Glass 3.

Apple iWatch
It could take cues from the circular Moto 360

The move, though expensive, would be much appreciated. We've brushed our Android Wear smartwatches against walls in just one week's time and that's too close for comfort.

At the heart of the iWatch needs to be a speedy, yet small processor along the lines of the 1.2 Qualcomm Snapdragon 400 that's inside the Samsung Gear Live.

It would also help if Apple could match its two Android Wear competitors' the 512MB of RAM and 4GB of internal storage. Something tells us it won't be user-replaceable.

Sensors

Apple isn't all about cramming more megapixels into its smartphones vs the competition, but it may be inclined to add more sensors than any other smartwatch manufacturers.

The iWatch has been speculated to include more than 10 sensors including an accelerometer, gyroscope, altimeter, compass, heart-rate monitor, pulse oximeter, among others.

This would pivot the iWatch from an iOS notification-reading wearable to a full-fledged fitness tracking devices, taking cues from the Nike FuelBand SE and expanding on that relationship.

Health-focused smartwatches and apps seem like the future of wearables given the biometric sensor-filled Samsung Simband prototype and Apple's own iOS 8 Health app that's just crying out for the iWatch.