What stays on your device
By default, everything. Your swing videos, the skeleton the app extracts from them, your scores and history, your golfer profiles and their names, heights and handicaps — all of it is stored on your iPhone and never sent to us.
You do not need an account to use Coach.Cloud Golf. If you sign in with Apple, we keep the Apple user identifier and email in your device's Keychain so the app can recognise you across reinstalls. There is no server-side account, and signing out removes them from the device.
Separately, you can sign in to a Coach.Cloud account to work with a coach. That is optional too — see "Working with a coach".