Simple GPS Tracker Receiver works in conjunction with Simple GPS Tracker Sender app.
You can use this app to retrieve location information that has been sent from a device that run Simple GPS Tracker Sender app.
Sign in with the same Google Account at both devices (device with Simple GPS Tracker Receiver and device with Simple GPS Tracker Sender) and you are ready.

Network connection required , but only a few bytes needed. You can retrieve location information every minute for a day, and you use only 50 kilobytes of your data or retrieve location information every minute for 20 days and use only 1MB!

*Permissions*
Simple GPS Tracker Receiver requires then following permissions
Location
Maps