Neumonic

Neumonic helps you permanently memorize your 12-word BIP-39 mnemonic seed phrase using scientifically proven spaced repetition. Based on the Ebbinghaus forgetting curve, the app schedules reviews at optimal intervals — from 20 minutes to 1 month — so each word moves from short-term to long-term memory. Your seed phrase is stored exclusively in the iOS Keychain and never leaves your device. No servers, no network calls, no cloud sync. Fully offline. The app breaks the 12 words into manageable groups of 3 and guides you through 4 quiz types that progressively increase in difficulty: fill-in-the-blank, sequence ordering, position recall, and full recall typing. A session-based learning system unlocks new word groups only after previous ones are mastered, ensuring a solid foundation at every step. Push notifications remind you exactly when to review so you never miss the optimal timing. Stay motivated with gamification features including streaks, XP-based leveling, and achievement badges. A dark-themed interface keeps your eyes comfortable, while Face ID / Touch ID lock, screenshot blocking, and background blur protect your sensitive data at all times. BrainWallet supports BIP-39 wordlists in 10 languages and the app UI is localized in Korean, English, Japanese, Simplified Chinese, and Spanish.