This app is Table Tennis score board.
It automatically display score ,games, service side and change court by rule.
The following is how to use it.

You click a score board , then score is counted up.
You click the button in lower end both sides, then score is counted down.
Racket mark indicates service side.It automatically change sides every 2 points. You click a racket , you change service side compulsory.
The court automatically change every game.
The game count is automatically counted up.You click minus-button below game count indicator, the game count is counted down.