TrackMyGolf delivers a golf swing analyzer right on your wrist. Watch your golf swing at up to 100 samples per second, as captured by the built-in motion sensors of your Apple Watch. There’s no extra hardware to buy (similar products sell for up to $150). An Apple Watch is required in order to capture your golf swing analysis. TrackMyGolf Golf Swing Analyzer Features: - Find out your golf swing power and speed measured in MPH (speed measured is hand swing speed, not club head speed) - Visualize your golf swing form in 3D - Rotate view in any direction to look at your golf swing from any angle - Up to 100 samples/second so that you can see details no human eye can capture - A number of data reported including hand swing speed, tempo, swing plane, impact angle, swing path, grip angle, and golf swing power. - Swing data stored in the cloud so that you can revisit at any time - No Internet connection required during swing. Your golf swing analysis saved to cloud when the phone is connected to the Internet later. - Support both left-handed & right-handed golfer This golf swing trainer tool is extremely helpful in visualizing your arm movement through the swing. For example, you can visualize how your arm cross over through the impact zone. Another use of the Apple Watch golf swing reader, if you tend to cast early, you can visualize your arm pushing out and swinging outside in to compensate. Advantages compared to other golf swing analyzers on the market: - No hardware to buy, just use your Apple Watch. Other analyzers cost $150+ - No calibration, no set up. Start the golf swing trainer app and play. - No switching. No need to switch the sensor when you switch the golf club. - No extra weight. Nothing is attached to the shaft, so your golf swing power and form are never affected. You can even use it on the golf course to capture your game swings. Please make sure you sign in to iCloud on your phone. This app stores your swing in iCloud so that you can visualize it on phone and review later. Limitations: Because the sensor location is on your wrist, you will not see problems associated with your hand. For example, if you flip your hand or un-hinge too early, you will not be able to visualize the problem. However, a hand flip is usually a result of compensating for an early arm casting, so you can get a hint from your arm trajectory. We appreciate your feedbacks. If you see a problem or have a suggestion, please do not just leave a negative rating (yes 4* is a bad rating, we have a high standard :-)), because we have no idea why. Tell us the problem so that we can improve the product. Better yet, email us directly at [email protected]. Like other reviews have mentioned, we provide a speedy support, we typically respond within 30 minutes. The watch app will invoke HealthKit API to request starting a golf workout session when you click "start session" on the watch interface. ** Watch OS3 is required for this app. If it is not showing on your watch, go to Apple Watch app on Phone, choose "General->Software Update" and follow instructions. ** ** You need to sign in to iCloud. All swings are stored in your iCloud account. No swing will show if you do not connect an iCloud account ** ** Turn off sensors afterwards to save battery, by Force Touch, then choose "End Session" **