Neumonic vs Calvin Chess Trainer

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.

Calvin Chess Trainer drills the skills that puzzles take for granted: seeing the whole board, and reading and finding squares and moves without thinking. Daily warm-up Five quick timed drills, about five minutes: find the checks, spot the loose pieces, find the forks, name squares from Black's side, then a mate in one. Vision • Find Checks: every check in a real game position • Find Captures: every capture on the board • Hanging Pieces: every undefended piece • Forks & Skewers: the squares that hit two targets • Knight Sight: every square a knight reaches • Knight Flight: the fewest moves to the target • Pawn Attack: slip past a wall of pawns • Mate in 1: 400 positions, one move to mate Notation • Squares: find the square, fast, from White's side or Black's • Files & Ranks: name every file and rank • Read Moves: read a move, then play it • Piece Letters: K, Q, R, B and N at a glance • Piece Values: which side comes out ahead? Opening Explorer Play through the openings with book moves, Stockfish hints and an evaluation bar. Practice your way • Practice at your own pace, or race the clock in timed rounds • Every drill remembers its setup, and Continue picks up where you left off • Results show the answers you missed • Personal bests, saved on your device • Squares and pieces spoken aloud as you play • Works offline No ads, no in-app purchases and no account. From Internut Education.