Any game with points. Add the players, tap to score. It remembers until you clear it.

Cancellation scoring: a bag in the hole is 3, on the board is 1, and only the difference each round counts. First to 21 wins. With the bust rule on, going over 21 drops you back to 15.

Single elimination. Names in, tap the winner of each match, the next round fills itself. Byes go to the top seeds.