Open Sudoku

534 reviews
Content rating
Everyone
10K+
Downloads
Content rating
Everyone
Learn more
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About this game

Features:
• Without ads
• Puzzles can be downloaded from web, entered by hand or generated on the project's homepage
• Game stats (time spent, mistakes)
• Next step hints with multiple strategies suggestions
• Import to and export from a file
• Visual themes including custom theme editor
• Several input modes (finger-friendly numpad, popup, keyboard etc.)
• Double pencil marks
…and much more.

More information (including how to report ideas and issues) can be found on the project's home page: http://opensudoku.moire.org
Open Sudoku is an Open Source Sudoku game.
Updated on
Sep 18, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

Ratings and reviews

498 reviews
Per Nystrom
July 27, 2020
So happy to have found this! It fixes the "problems" with the original from Roman MaŔek. And when I say problems, I mean that over the years the Android OS broke backward compatibility and you could no longer get to the menu. I don't blame the developer at all for this, but I'm thrilled that someone has taken it up and modernized it. Thank you!!!
18 people found this review helpful
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--
February 4, 2022
Open Sudoku, how did I not know about you before now?! Thank goodness I found you. I was still playing on the original, after it lost many of it's features. 1- you are fully functioning: filter out completed games, choose the theme colors, choose the kind of keypad, add my own puzzles, 2-no ads !!! 3- no intrusive permissions!!! Thank you so so much.
12 people found this review helpful
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Angela
September 14, 2026
finally an actually free and ad free app. only bummer is that once you're done solving the puzzles, you have to download more on your own. also not sure what the hand and ! icons are in the puzzle lists
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What’s new

- New 'Validate pencil marks' feature to highlight clearly invalid marks
- Fix multiple landscape visibility issues (board and keypad)
- Improve edge-to-edge compliance and fix UI overlaps
- Improve theme selection UI and primary color preview in custom themes
- Fix App Not Responding issues during batch undo operations
- Performance optimizations
- Translations updates