Retro Brain Trainer

Retro Brain Trainer is a daily brain training app built around classic cognitive challenges — wrapped in a retro pixel art style that makes every session feel like a game. Whether you have 2 minutes or 20, Retro Brain Trainer has a game for you. GAMES Math Exercise Solve arithmetic problems and write your answers by hand. The app uses an on-device AI model to read your handwriting in real time — no internet required for recognition. Also available in multiple choice mode. Time Attack How many math problems can you solve in 30 seconds? Test your mental speed under pressure. Memory Match Flip cards and find matching pairs. Three difficulty levels with increasing grid sizes. Schulte Table Numbers appear briefly on a grid, then hide. Tap them in order from memory. A classic focus and attention exercise used by speed readers worldwide. Stroop Test See a color word written in a different ink color — tap the ink color, not the word. Harder than it sounds. Sudoku Classic 9x9 Sudoku puzzles in three difficulty levels, freshly generated every time. FEATURES - On-device handwriting recognition powered by a custom-trained neural network (no data sent to servers) - Global leaderboard — compete with players worldwide using a nickname of your choice - Daily streak tracking to keep you consistent - Personal bests saved locally for every game mode - Retro pixel art design with sound effects and haptic feedback - Full offline support — play without internet, sync scores when connected - No account or registration required to play - Complete data deletion — remove all your data anytime from Settings PRIVACY Retro Brain Trainer does not collect personal information. The only data stored on our servers is your chosen nickname and game scores for leaderboard purposes. Everything else stays on your device.