The Pathfinder Application requires the Pathfinder Connector device and works Android 4.3 or higher and up with Bluetooth 4.0 and BLE. The Dogtra GPS Application works with the Dogtra Pathfinder and brings GPS tracking and E-collar training right to your smartphone. Features: GPS dog tracking includes access to terrain and satellite map views with a powerful zoom capability that provides greater live-action detail and accuracy when you're in the field. Dog training features in Nick, Constant,