iOS app to collect high-frequency tennis motion data from its Apple Watch counterpart, written in Swift using the new CoreMotion capabilities (mainly CMBatchedSensorManager).
The iOS app is UIKit-based, and the watch app is SwiftUI.
The development process behind this app is described here: https://hackernoon.com/getting-hiqh-frequency-tennis-motion-data-from-apple-watch
The early data analysis can be found here: https://hackernoon.com/getting-hiqh-frequency-tennis-motion-data-from-apple-watch-part-2
Sample accelerometer data:
