Arccos Golf GPS Shot Tracker Golfs first fully-automatic GPS and shot-tracking system Pair sensors just once with each club and Arccos automatically tracks your statistics with zero interruptions to your game Stats are instantly available on your smartphone. Arccos is compatible with iOS 8.0 and above, and Android Lollipop, version 5.0 and newer devices. Use the Arccos app for Apple Watch for additional features, including customized club recommendations and enhanced shot editing Proprietary Tour Analytics platform translates every stat captured, letting you know how to apply it to improve your game Please refer below the trouble shootings steps under Product Description