ThrowKit Turns an Apple Watch Into a Dart-Throw Coach

Field notes

The proposed workflow uses the watch as a motion sensor rather than a dartboard scorer: players start a session, throw without tapping after each dart, and review the sequence on an iPhone. The site describes a 0–100 repeatability score, separate backswing and follow-through measures, and analysis of when mechanics drift during a session. It also states that processing stays on the user’s devices and works without an internet connection.