How table tennis scoring works, on your wrist.
A point takes a second. The serve changes every two. All Sports Score Keeper keeps both, so you can stay at the table instead of checking a phone between rallies.

11 points, or 21
Modern games are first to 11, win by two. Older club games still go to 21. Pick the target before the first serve and the watch follows it for the match.
Two points, then one
The server changes every two points. From 10-all in an 11-point game, or 20-all in a 21-point game, the serve changes every point until someone leads by two.
Tap, swipe, undo
Score with a tap or a swipe and a short haptic. One undo puts the last point back if a rally was replayed. The phone can sit in a bag; the watch has the score and the server.
History on the watch
Finished games stay on the device. Optional Pro adds live heart rate, calories, and steps, and syncs the match to the phone when you want it there.