Mind Cipher vs Dr. Number

Mind Cipher is a Mastermind-style code-breaking game — Bulls and Cows, Hit and Blow, played with colors — filed as a spy dossier. Crack the hidden color code from ink marks: a filled dot is exact, a ring is the right color in the wrong slot, a dash is not in the code. The marks never rely on color, and an optional Shape Marks setting gives every peg its own outline. Then open the Lie file. Exactly one report in the round is fake. The rest are true. Cross-check the reports, find the contradiction, and crack the code anyway. Classic cases teach the real marks: 240 cases from beginner to master. Lie cases run a matching 240 where one clue always lies. Today's Case is a new puzzle every day, with Top Secret lie days and a home-screen widget. Duel Mode is pass-and-play: one sets the code, the other breaks it. Notes sit on the board so you can mark eliminated and confirmed colors. Informants (hints) are recruited by closing cases. Every closed case ends with a stamped report you can share. No ads. No account. Free to start: Today's Case, Duel, Classic 1–40, and Lie 1–80. Pro is a one-time $2.99 unlock for the rest of both files, Free Play, and the custom editor. The app follows your language, or you can set it in Settings: English, 简体中文, 繁體中文, 日本語, 한국어, Español, العربية, Deutsch, Français, עברית, Português, Türkçe. Share your case with a friend. On iPhone, they can accept the challenge with App Clip, without installing the full app.

Dr. Number is a number-deduction puzzle — a code-breaking brain game reimagined with daily challenges, real-time duels, and global rankings. The game goes by many names: Bulls and Cows, Cows and Bulls, Hit and Blow, Number Baseball, 1A2B. The rules never change — crack the hidden number. HOW TO PLAY Guess the secret code. Each guess tells you how many digits are exactly right (right digit, right spot) and how many are close (right digit, wrong spot). Use logic to crack the code in as few tries as possible. THREE WAYS TO PLAY • Daily Challenge — Everyone in the world solves the same puzzle each day. Build your streak and share your results. • Single Play — Choose 3 or 4-digit codes, track your best records, and use pencil marks to narrow down the possibilities. • Versus — Jump into a quick match, or challenge a friend directly. Both players set a secret code and take turns guessing — first to crack it wins. Climb the ranked leaderboard. FEATURES • Global daily rankings and versus leaderboards (Elo-based) • Invite friends with a code or QR link for private matches • Pencil marks (memo) to track possible digits like a notebook • Unlockable color themes and avatars • 10 languages supported YOU WILL LIKE THIS IF YOU ENJOY • Number guessing games and logic puzzles • Brain games and mental workouts, the way sudoku is • Quick single rounds that fit into a short break • Head-to-head puzzle duels against friends No reading required — the rules click in seconds, and the logic keeps you coming back. Start Dr. Number today and climb the Bulls and Cows leaderboard!