IQ boost is a brain game based on the Dual N-Back cognitive exercise.

This exercise is the only mental activity that is proven to improve your short-term memory and fluid intelligence.

The game involves remembering a sequence of letters and a sequence of positions of a square at the same time.

IQ boost includes an in-game tutorial, adjustable difficulty levels and detailed reporting of your progress as you improve.

Read more about the Dual N-Back study in Wired, or read the paper.