Name: Volleyball Score - Set Scorekeeper
Author: RiversideArt

Volleyball Score keeps rally scoring for indoor volleyball: sets to 25 by default, a deciding set to 15, win by two, best of 1, 3 or 5 sets. Targets can be changed in settings for club and school formats.

It shows the points, the sets won and the serving side.

Controls:
Up button or top half of the screen: point for us
Down button or bottom half of the screen: point for them
Back: undo the last point
Menu: new match (press twice during a match, so a slip does not wipe the score)
The rules are set in the Garmin Connect app, and a match in progress keeps the rules it started with.

One-time purchase with no subscription, seven days free to try, and no permissions asked.