Enjoy your tennis with your Apple Watch! This is the first tennis activity tracker & swing analyzer app for Apple Watch. Just wear your watch on your wrist and play. Tennis Plus : Tennis Tracker & Swing Analyzer Features - Simple UI & Quick start - Breakdown your shot and check your style (forehand, backhand, topspin, flat, slice, volley, smash, serve) - Measure your swing speed & spin - Video playback synced swing recognitions. - Support right-hand and also left-hand grip player - Real time detection of swings - Energy efficient for battery life (Optimized & accurate algorithm) - Working all the time you play (Even when the screen is off) - Everything is synced automatically with your iPhone - Check your step counts & calories during the sessions (integrated with the HealthKit) ** Apple Watch & WatchOS 3.0 is required but no need any other device ** WatchOS 3 still has some stabillity issues. We recommend disabling watch notifications while the app is running. ** Please feel free to send me your feedback. (use e-mail or twitter)