Duoku

Competitive sudoku game

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Think you're good at Sudoku? Prove it. Share puzzles with QR codes, track every stat, and crush your friends! Your Sudoku skills are about to get tested. Four difficulty levels, a 3-mistake limit, and a ticking clock — every game is a race against yourself AND your friend. Share any puzzle with a friend and settle it on the same board. SHARE & COMPETE Every puzzle has a unique 4-character code. Send it to a friend, scan a QR code, or tap a link — you'll both play the exact same board. No more "I had an easier puzzle." Same grid. Same solution. Settle it. CHALLENGE YOURSELF Pick from Easy, Medium, Hard, or Expert. Each wrong move counts — three mistakes and it's game over, with a 60-second time penalty on every error. Use pencil notes to plan ahead, undo when you need to rethink, and push for a clean solve. TRACK EVERYTHING Your stats dashboard breaks down win rates, best times, average solve speeds, and mistake counts — all by difficulty. Chase personal records. Watch yourself get faster. BUILT FOR FOCUS No account required. No clutter. Autosave picks up exactly where you left off. Dark mode for late-night sessions. Haptic feedback on every tap. Designed to feel like it belongs on your phone. FEATURES • 4 difficulty levels — from beginner-friendly to expert-only • Pencil notes for tracking candidates • Undo and erase in one tap • Timer tracks every second • Smart highlighting for rows, columns, and matching numbers • Unplayed puzzles are served first • Continue any game, anytime • Full VoiceOver accessibility • Works offline

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The developer, Jan Lesak, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Jan Lesak
    Size
    5.7 MB
    Category
    Puzzle
    Compatibility
    Requires iOS 18.6 or later.
    • iPhone
      Requires iOS 18.6 or later.
    • Mac
      Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.6 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Jan Lesák
  • Privacy Policy

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