KidsWatch tracks itself by using two systems GPS and LBS.
GPS – Global Positioning System is a navigation and tracking system that uses satellite conections and radio waves. This system can compute the exact geographic coordonates of a object or person on the surface of the earth as long as it has a device that contains a GPS receptor.
LBS – Location-Based Service is a tracking system that uses mobile phone signal. The tracking is done by using GSM cell towers of local mobile phone service providers.
Tracking through LBS is less precise when compared to GPS because the device estimates its position in the area of the cell tower.