DigitSort vs Advanced Dual N

A number puzzle where you have to put mixed up digits back in order from 1 to 9. Inspired by a similar game I had on palmOS once.

Advanced Dual N-Back is the working memory protocol from the research, built to be done every day: one visual stream, one audio stream, and a level that follows you. Inspired by dual n-back working-memory research, including Jaeggi et al. (2008). HOW IT WORKS In each session, a sequence of positions and sounds is presented simultaneously. Your task: identify when the current stimulus matches the one from N steps back. As you improve, N increases, keeping you always at the edge of your capacity. FEATURES • Classic Dual N-Back protocol (position + audio) • Workshop library: all 28 Brain Workshop combinations and 110 variants, from Quad and Pentuple to Crab, multiple objects and cross-modal tasks • Arithmetic, Crab-Back and Image Pairs presets for when classic gets easy • Seven sound sets including piano, Morse and NATO, and grids up to 5x5 • Training profiles, plus session export and import • Adaptive difficulty: N adjusts automatically based on your performance • Detailed session history and progress charts • Customizable session length and number of trials • Daily reminders to keep your training streak • Offline. No internet connection required • Premium features available through an optional one-time in-app purchase. No subscription • Clean, distraction-free interface THE SCIENCE Working memory is the mental workspace your brain uses to hold and manipulate information in real time. This app provides structured working-memory practice. It does not diagnose or treat a medical condition or guarantee improvements in intelligence. You start at 2-back, the level the original study used, after a short tutorial that teaches one stream at a time. Most people aim for 3 to 5 with consistent training.