Apple`s smartwatch is a device that transplants the features of an iPhone onto a smaller screen that's never more than an arm's length away.
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The gadget marks the attempt to usher in an era of wearable computing and lift its sales with another revolutionary product.
The Apple Watch will allow users to view messages and apps on the wrist. The device will use a "digital crown" to scroll, zoom and navigate without obstructing the display. The side-mounted crown also serves as the home.
The home screen has all the apps, arranged in rows. You use the dial to zoom in and choose one. The touch screen lets you slide to see different portions of your app collection.
As for using the dial to zoom in and out, Apple says that improves usability because you're not blocking maps and other content on the screen the way pinching in and out would. With your home screen, for instance, you still need the slide apps around.
With the Apple Watch, you can even rearrange apps so that your favourite ones are toward the middle.
Apple announced a few useful ones, including the ability to unlock your Starwood hotel room with a tap of your watch. That's easier than pulling out your room key from your wallet. BMW also promises one to help you find your parked car in a crowded lot.
