A free app for Android, by Apstan Apps Lab.

Find My Headset is a very cool app that allows you to find your lost Bluetooth devices in no time. 

If you’re one of the millions of people who carry their smartphones with them all the time, then you know how frustrating it can be to lose your device in a crowded place. With this app, you don’t have to worry about such a thing happening anymore. It will locate all the Bluetooth devices in your vicinity and list them for you. You can easily pick out your desired device from the list and track it to its location. So, whether you’re at a cafe or at a friend’s house, this app will keep you protected.