FourLock

4-Digit Code-Cracking Duel

Free · Designed for iPad. Not verified for macOS.

Hide a 4-digit code. Crack your opponent's before they crack yours. Duel friends online, pass-and-play on one phone, or take on the computer. Fewest guesses wins. Crack the code. Outsmart your opponent. FourLock is a head-to-head code-cracking duel. Each player hides a secret 4-digit code, and each takes a turn cracking the other's. Every guess earns you two clues: • POSITIONS – right digit in the right spot • NUMBERS – the digit is in the code, somewhere Use the clues, rule out what can't be true and work your way to the answer. You have up to 20 attempts. Whoever cracks the code in fewer guesses wins. Easy to learn, hard to master. Every match is a new puzzle. THREE WAYS TO PLAY Online Duel Create a room and share the 5-character code with a friend, or join theirs. You both set your secrets in private, then race to crack each other's code at the same time. You can watch your opponent's progress live. If your connection drops, FourLock reconnects and puts you back in your game. Local Duel Play with someone next to you on one device. Set your code, hand the phone over and take turns. A hand-off screen keeps each secret hidden. Roles swap for the rematch. Play vs Computer Take on the AI at Easy, Medium or Hard, and choose who guesses first. Hard mode is a real test of logic. You can play offline, with no account. TRACK YOUR PROGRESS • Wins, losses, draws and win rate • Average and best attempts, plus streaks • Full match history with every guess, round by round MADE FOR FOCUSED PLAY • Clean design in light and dark themes • Sound and haptic feedback that you can switch off • An interactive tutorial teaches the rules in under a minute • Play as a guest, or sign in with Apple or Google THE RULES • Codes use digits 0–9 with no repeats. A code can start with zero. • Up to 20 guesses per round • Fewer attempts wins. If you tie, it's a draw. Think you can crack it in five? Download FourLock and find out.

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    Information

    Seller
    Beyondsy Solutions LLP
    Size
    22.1 MB
    Category
    Puzzle
    Compatibility
    Requires iOS 15.0 or later.
    • iPhone
      Requires iOS 15.0 or later.
    • iPad
      Requires iPadOS 15.0 or later.
    • iPod touch
      Requires iOS 15.0 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Beyondsy Solutions LLP
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