Wear Aware (Phone Finger)
You may or may not know this existed, but there are a few apps on the Google Play Store that will help owners find a lost smartphone. If you're like my Fiance, and always lose your phone, this is the app for you.
Wear Aware acts as a leash to its paired smartphone, and will start buzzing and vibrating if you walk away. To make it even better, if a smartphone is lost you can use the app, or Android Wear voice commands to launch Wear Aware and turn on the phone. It will start peeping and set off an alarm, helping owners find a lost smartphone. Best of all, it's completely free.