Android Wear is Google's popular mobile operating system designed for wearable gadgets like smartwatches. Read: The best smartwatches of 2014: List of the best wearable tech you can buy right now.

The LG G Watch is one of two launch products for the platform alongside the Samsung Gear Live and will set you back a reasonable £159 – it's the cheaper of the two. More will arrive including the Moto 360.

Out of the three announced Android Wear smartwatches, the LG G Watch is certainly the plainest looking. It's an understated square black slab with little going on – there's not even a button on the side.

Read: LG G Watch vs Motorola Moto 360 vs Samsung Gear Live: Android Wear smartwatch comparison review.

The G Watch is about the thickness of a smartphone at 9.95 mm. We'd rather it was thinner but it doesn't feel too big when you've got it on. Weight isn't a problem at 63 g.

If you don't mind its simple appearance a bonus is the IP67 rating which means it's dustproof and you can jump in the shower without taking it off.

Although the supplied rubber strap has a nice smooth texture making it more comfortable than most, you can also change the strap for any 22 mm standard sized alternative you like.

You'll spend most of your time interacting with Android Wear via the G Watch's 1.65in IPS display. The size is just right and it looks great with nicely popping colours and a decent resolution of 280 x 280.

Although it's advertised as 'always on' you can opt against this and turn the screen on with a tap when you want it.

Under the stealthy black exterior is a competent 1.2GHz Qualcomm Snapdragon 400 processor with 512MB of RAM. About what you'd find in a mid-range smartphone and we've had no problems with performance on the G Watch.

Depending on how much you use the device the G Watch could last up to week before needing to be charged. You'll need to top the battery up via the cradle and although it charges quickly, it's easy to leave it behind.

The G Watch connects to a smartphone or tablet via Bluetooth low energy but you'll need a companion device with Android 4.3 Jelly Bean or later.

Android Wear is super easy to set-up and a tutorial will get you started with navigation but even if you skip it you'll quickly get the hang of the system.

In a nutshell, it's like have Google Now on your wrist and if that means nothing to you then Android Wear uses a card style system where each notification gets its own card.

You swipe up and down through all the available cards to view them, swipe right to dismiss or clear on and swipe left for more information.

Any notification you get on your companion device will come through to the watch but if some get annoying you can mute them via the app.

Aside from notifications Android Wear has some other party tricks including counting your steps and voice commands. Although talking to your wrist is a bit odd, you can do all sorts with your voice – like ask Google a question, dictate a text message, set a timer and much more.

Overall, Android Wear is the best platform for smartwatches available but it's not perfect. You can't recall cards or order them the way you want, for example.

The LG G Watch is the best smartwatch we've reviewed so far, partly due to the affordable price tag and the excellent, Android Wear system. If the design is not for you check out the Gear Live and sit tight for the Moto 360 and others.

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