Go to DroneTrack.org to track your drone using this app.
Track your drone, UAV, quadcopter, helicopter, plane, car, boat... online on the world map.
Install this app on an old mobile phone and place it on your UAV.
The app will transmit the device's GPS coordinates to the DroneTrack.org map.
You can also trigger an alarm remotely from the tracking map.
The DroneTrack.org service is free and anonymous.