New Star Games is a great little indy games publisher with multiple titles for Android and iOS. My favorite is Retro Bowl [1], a fun little retro-style American football game. They also make Retro Goal [2], a football/soccer game. There are some IAPs, but they are mainly used to unlock the full game and are very reasonably priced.

[1] https://www.newstargames.com/servlet/Content/en/text/release...

[2] https://www.newstargames.com/servlet/Content/en/text/release...

Edit: Formatting