Its the best chess app on the store!

There are many, MANY features. Features such as the tactics and daily puzzle systems, which teaches you to identify the best moves in various situations. Those plus the fantastic lessons that teach openings, strategy, endgame, and more. The app offers chess articles, news, forums, and tens of ways to play chess. Altogether, this app is extremely comprehensive and theres nothing else like it as of now.

RaynMaker99 about Chess - Play & Learn, v3.4.11