Memory Dual N-Back is an application that tests your memory, the ability to focus, and your ability to memorize. It is based on a scientifically proven method of improving your brain.

This is a free application that can be downloaded on Android devices. The goal of the game is to tap on a button when the cell or color that is being shown is repeating. You have to memorize the sequence of cell flashes for N=1, and when the cell or color is immediately repeated you can tap the correct button to score. For higher values of N, you should tap the button when the cell or color is repeating.