Advanced Dual N vs Echo Ramsey

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.

Echo is a puzzle game built on real open problems in mathematics. Each puzzle is a graph: dots joined by red and blue lines. Your job is simple to learn. Tap a line to flip its color, and break up the "bad cliques" - groups of dots all wired together in a single color. Clear them within your move budget and the puzzle is solved. Here is the twist. Every puzzle is a slice of a genuine research graph, and every solution you find is committed to a shared, growing proof tree. When you solve, your result seeds a brand new puzzle for another player. Their solve seeds the next. Together, the whole community is searching for colorings no person and no computer has ever found. You choose which problem to work on from the home screen: - R(4,4), the practice board - solved long ago, so the search genuinely finishes and you can see the whole engine work end to end - R(4,6), the frontier - an open problem where reaching zero would set a real new record - R(5,5), the legendary one - open for decades, where the prize is the lowest count the network has ever driven it to You do not need to know any of that to play. If you can spot a pattern and tap, you are already contributing. FEATURES - Quick, tactile puzzles you can finish in a minute - Three problems to play, from a winnable warm-up to a famous unsolved one, switchable any time - Five ways to view each graph: circle, spectral, matrix, hub, and density - switch any time to see the structure differently - A living progress screen showing the community's best reach and the proof tree growing in real time - Your lineage: see how many puzzles your solves have seeded for other players - A built-in glossary that explains every term in plain language - No ads, no timers, no pressure Color the graph. Advance the proof. Echo forward.