FreePhoneTracker is application software that constantly monitors your location. They function by activation of the GPS. A GPS or a Global Positioning System is a tracking system that pinpoints your location of the concerned device. This navigation system connects various networks of satellites to track the location. These satellites send back the data of the precise location to the devices. The GPS receiver monitors the signal and compares the time at which it was sent and received. This data is then prompted to the GPS receiver system that calculates the precise location of the device with efficiency and accuracy. FreePhoneTracker is the best mobile tracking app for both Android and iPhone devices. It has a lot of great features that have never been seen before in any of the mobile tracking apps on the market.