Big Bro GPS is an iOS version of the original application “Big Brother GPS”. This very simple application runs as a background task and is able to send the smartphones position with HTTP POST request to an URL defined by the user.
The program returns the latitude, the longitude and the accuracy from the GPS. The user can also define a “secret” parameter, allowing the server to identify the device.
A new position is sent to the server when the GPS reports a displacement longer than 20 meters.
Here a PHP script example http://go.heig-vd.ch/bigbro