Crossword Puzzle Free - Crossword Puzzle Free is an app by Redstone Games that provides you with a variety of different puzzles according to various difficulty levels such as easy, medium, hard, and pro, etc.

LogicLike - Improve logical thinking through engaging brain games

Word Pursuit - Word Pursuit app allows users to put their knowledge about the language and vocabulary to the test by solving puzzles.

Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.

Logic Puzzles Daily - Logic Puzzles Daily app comes up with features to help you in taking challenges so you can clear levels after levels of brain teasers.

JobFlare - Brain games for job seekers