Did you know you can use your iPhone or iPad as a baby monitor? Neither did we until we came across the Withings Smart Baby Monitor.

It connects over Wi-Fi, and via the free app, streams video of your little one from anywhere you can get an internet connection – even over 3G.

The app doesn't just stream video though. It tells you all sorts of other things, such as the humidity, temperature and noise levels in the baby's room. And you can get it to issue alerts for all these different readings.

The camera can take a picture, and you can play a lullaby or speak to your child to soothe them back to sleep with the sound of your voice. The 3-megapixel camera also has an essential night-vision mode.

The setup procedure was refreshingly easy and we were soon up and running. The picture quality isn't particularly high, but it was good enough for its intended purpose, and the night vision worked well.

We also really liked the ability to talk through the unit from our iPhone. The app keeps the audio going in the background, so you can keep listening even when you're using your email client or browsing the web.

But the main problem is that if you start playing with more demanding apps on your iOS device you can interrupt the stream coming from the camera, and a restart of the app is required. You could use the Withings unit as a security camera to keep an eye on your home while you're away, but there are cheaper options available if that's all you need.

Follow TechRadar Reviews on Twitter: http://twitter.com/techradarreview