Pi Trainer: Digits of Pi

Pi Trainer is a simple, focused way to memorize the digits of π (pi). Practice by typing the next digit from memory using a full-screen numeric keypad. The app tracks exactly where you stopped and where you made a mistake, so every session picks up right where you left off. Features: • Practice mode with instant feedback on every digit • A reference screen with all the digits laid out in an easy-to-scan grid • Progress tracking and your personal best streak • Unlockable themes as you memorize more digits (10, 20, 30, 40, 50, 60+) • Customize the color of each digit to build your own memory associations • Optional background music while you practice Pi Trainer works completely offline. There is no account, no ads, and no data collection of any kind — everything stays on your device.