Sudoku Atlas: 4×4 to 25×25

No ads. Big grids. Pay once.

Only for iPhone

Free · In-App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

A new free puzzle every day, plus grids from 4×4 to 25×25. No ads, no tracking, no subscription: one purchase and it's yours forever. Sudoku the way you actually want it: every grid size, no ads, no tracking, and a single one-time purchase. Pay once, own it forever. EVERY GRID SIZE From quick 4×4 and 6×6 warm-ups to the standard 9×9, all the way up to sprawling 16×16 and 25×25 marathons. The full spectrum, from two-minute breaks to multi-day challenges. A FREE DAILY PUZZLE THAT NEVER EXPIRES A new 9×9 every day, free forever, no account required. Difficulty cycles through easy, medium, hard, and maximum. The free version isn't a teaser. It includes a demo bank of puzzles across every grid size and difficulty so you can try everything before you decide. FOCUS MODE Pick a cell and every value but one blurs away, placed digits and pencil marks alike. Your chosen number stays crisp so you can scan the whole board and see exactly where it can still go. STAMP MODE Lock a digit and stamp it across the board in one motion. Pencil marks for candidates, glyph stamps for confident answers. Switch freely between them. CHECKPOINTS Save your board at any point and rewind if you hit a dead end. Try bold moves without fear of losing progress. SEED SHARING Every puzzle has a seed code. Share it and a friend gets the exact same grid in the exact same starting state. Race, compare, collaborate. LIGHT, DARK & HIGH CONTRAST Follows your system appearance and language by default. Light, dark, high-contrast themes and language can all be set manually. NO ADS. NO TRACKING. ONE PURCHASE. There is no ad SDK in this app. No analytics, no crash reporters, no account system, no server that knows you exist. Everything runs on your device and stays there. One purchase unlocks unlimited generation, all grid sizes, and seed sharing — no subscription, ever, and no previously free feature will ever move behind a paywall. These aren't marketing promises. They're structural decisions, and they're permanent.

Ratings & Reviews

  • This app has not received enough ratings or reviews to display an overview.

- New: a Reset button to clear the board and start the puzzle over from its original state. - New: the grid now flags when it's completely filled but not yet correct, so you know to keep looking instead of wondering why nothing happened. No ads, no tracking, one purchase. Always.

Version 1.0.10

The developer, JORGE MONTERO VARELA, 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 based, for example, 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

    Provider
    • JORGE MONTERO VARELA
    Size
    • 23.5 MB
    Category
    • Puzzle
    Compatibility
    Requires iOS 14.0 or later.
    • iPhone
      Requires iOS 14.0 or later.
    • iPod touch
      Requires iOS 14.0 or later.
    • Mac
      Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Jorge Montero Varela
  • Developer Website
  • Privacy Policy

    • You Might Also Like