[Android] Free: "Mind Games Pro" $0 (Was $4.59) @ Google Play Store

Rated 4.5 star with 29.2K reviews.

Exercise Your Brain! This is the unlimited, ad-free, version of the hit brain training app. Mind Games is a great collection of games based in part on principles derived from cognitive tasks to help you practice different mental skills.
This app includes all of Mindware’s brain exercising games.
All games include your score history and graphs of your progress.

If you have it already probably from this post 3 years ago. :)

via nocure at OzBargain