Here is a discreet car GPS tracker that sends you updates every 10 seconds. The ShieldGPS connects to the OBD-II port in your car and should work for most car models after 1996. You can use your iPhone, Android, or web apps to see where your car is in real-time.
ShieldGPS supports geofencing. It can send you alert when your vehicle enters or leaves a specific area. You can also see where your car has been. Speed alerts are available to detect reckless driving.[where to get it]