twenty1 app for iPhone and iPad
4.6 (
1056 ratings )
Games
Developer: Lucas Bowers
Free
Current version: 1.1, last update: 7 years agoFirst release : 02 Nov 2016
App size: 13.1 Mb
TwentyOne (or Nim) is a mathematical game of strategy in which you take turns against an Ai player, in an attempt to avoid the number 21. On each turn, you must add one, two or three to the total.