You can easily calculate scores by using Red&Blue Scoreboard!
Red&Blue Scoreboard is so simple and ad-free application.
It also includes the ability to calculate match set of matches for Table Tennis.
Touch the right side of the score area to add the score, and touch the left side to subtract the score.
Developer who make this app will coming back after CSAT(11/16) with a large scale update.
Please enjoy this app till that time!