Set Anchor - get an alarm when car
is moved out of security zone.
Devices communicate by SMS - no expensive internet
connection - in particular when traveling in foreign countries.
Car Audio Surveillance - hear whats going on
in your car - take action on suspicious noises.
Way Back Navigation - start Google Navigation
back to your car with one click.
Runs on Android 1.6 = almost every Android Phone
You need to install the same application to both Android phones.
Start one in 'Sensor'-Mode the other in 'Remote-Mode.'

You dont need to buy the Application twice. Use the same Google-Account on both devices ... or use this APK for the installation on the Sensor-Phone.
Programming: Christian Rotzoll
Image Source: Linus Henning & Hello Turkey Toe
Creative Commons - Attribution 2.0 Generic (CC BY 2.0)