Android Wear watches are coming. You are soon going to have more options to choose from. You certainly don’t want to lose your phone while you carry your smartwatch with you. The Wear Aware can help. It creates a leash between your phone and Android Wear watch and lets you know when you are about to leave your phone behind. Your watch will alert you by buzzing when your phone is out of reach. You can even ask Google to help you find your phone.
Just say “OK Google, Start Phone Finder”, and your phone will start trying to make you aware of it’s whereabouts by playing an alarm signal. No more running around at home trying to find your phone in silence, or calling it from another phone to find it.
You can try the app for free. Just bring your smartphone and compatible Android device, and you are set.[Source]