Zavoy Tennis is provided as it is, without a warranty. It computes the score and the statistics from what you tap; check anything that matters against the official result.
The charts you make are yours. The app keeps them on your iPhone and in your own iCloud Drive, and you export them when you choose to.
A coach link is a page for one coach, who signs in with a code sent to the email address or phone number you gave. You can turn a link off in the app at any time.
Questions about these terms: [email protected].