Dual N-back is a lifestyle app available on iPhone that offers a scientifically proven memory workout. With each session consisting of 40 turns, the app presents a 3x3 grid where a square lights up and a letter is read aloud. Your task is to remember both the letter and the position of the square, and indicate when the current square or letter matches the one from N turns ago.

The app allows you to track your progress and offers a toggle for automatic level adjustment. It also supports Dark Mode on iOS 13 and provides options to customize the game duration and delay between readings. Additionally, the app supports landscape gameplay and allows you to change the sounds and invert the buttons. You can even export your gameplay data and link your account with email.

Dual N-back provides a challenging and engaging experience for those looking to improve their memory skills. Download it for free and start your memory workout today!