n vs Dual N

Good brain trainer app for improving your working memory. ＜ USAGE ＞ 1. Select level (1-10). 2. Memorize the answer of easy addition for the level times. 3. Continue memorizing and tap the last digit of the answer of n times before (NOT current answer). If you don't know what is N-Back, please see below. http://en.wikipedia.org/wiki/N-back

■ What is Dual N-Back Dual N-Back is a scientifically proven brain training app that strengthens your working memory, concentration, and cognitive abilities. With consistent training, it helps improve your IQ, memory, and thinking speed. --- ■ Basic Rules The rules of Dual N-Back are simple, yet your brain works harder the more you play. * Remember the sequence of positions and letters displayed on the screen. * When the current position or letter matches the one shown N steps earlier, press the corresponding button. * Each correct answer sharpens your memory and focus — like a workout for your brain. * The challenge continues until all lives are lost, testing your concentration and endurance. --- ■ Main Features * Difficulty Adjustment: Choose from N-2 to N-5 and train at your own level. * Progress Visualization: Track your training volume with graphs and see your improvement through the average correct answers per game. * Statistics and Calendar: View summarized stats such as play count, accuracy rate, and average score. Review your progress on a calendar to stay motivated. * Global Ranking: Compete with players around the world and challenge the limits of your brain. --- ■ The More You Play, the Stronger Your Brain Becomes Just a few minutes a day — on your commute or during a break — can make a real difference. Every session helps your brain grow stronger, step by step. Take one step today to evolve your mind.