Super Positioning

Super Positioning is a free open source location tracking service that lets you track the geographic location of things.
With the Super Positioning app, you have full control over your location data. You can specify the content of the report and the time to store the data before it automatically times out.

Each device has its own unique device ID. This device ID is used along with the server address to identify the device. If you want to add devices from the same server to the list, you can easily scan the device QR code provided by the app.

The Super Positioning app uses the power saving technology that comes with iOS. Switching accuracy can consume as little battery as possible, depending on whether it is running in the background or in the foreground.