ZenTracker can track your child's location in real-time and send you messages if your child leaves a designated safe area. This child tracking application is built on top of the Google Maps and Google Latitude API's.
To keep track of your children your child's smartphone needs to be able to run Google Latitude. Google Latitude then keeps track of your child's location. ZenTracker regularly requests your child's geolocation from Google's servers. ZenTracker then checks the smartphone location against user-defined rules and sends you a notification if the location matches a specific rule, for example, your child has left a defined safe location.
Using ZenTracker users can define safe perimeters, such as the home or their school, so if a child leaves these areas a message will be sent to the parent.