** What is Dual N-Back ** Dual N-Back is a scientifically verified game that can train the following abilities of the brain. IQ Flash memory Cognitive improvement ** Basic rules ** Memorize the displayed panels in order. Press the button of the same element as the panel displayed N times before. Press the Place button if the location is the same, and press the Letter button if the letter is the same. The mode keeps running until you get a set number of lives wrong. Solve more problems and train your IQ and flash memory. ** App Features ** Adjust difficulty level from N-2 to N-5 Display brain training statistics Ranking function to compete with players around the world for high scores