No ads
Love that there’s no ads, and it’s easy to use with a nice color scheme
Free
About
Enjoy a classic Sudoku experience with a clean, ad-free interface. This game offers five difficulty levels, daily challenges, and smart tools to aid your gameplay. Track your progress with lifetime statistics and compete on leaderboards.
✓Ad-free gameplay
✓Five difficulty levels
✓Daily challenges
✓Smart note-taking tools
✓Lifetime statistics
✓Game Center leaderboards
✓Offline play
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What's New in Zenoku
1.2
August 13, 2026
Hints, reimagined. Hints now walk you through the answer in three quick steps right on the board — the numbers doing the work, the block being scanned, and why only one square is left. The board stays fully visible the whole time. Sharper notes. Select any number and it stands out in bold everywhere you've noted it.
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FAQ
Does Zenoku have ads?
No, Zenoku is completely free of ads. The developers emphasize an uninterrupted puzzle experience with no banners, videos, or interruptions.
What are the difficulty levels in Zenoku?
Zenoku offers five difficulty levels, ranging from Easy to Extreme. Each level has its own rules for mistakes and hints, catering to a wide range of player skills.
Can I play Zenoku offline?
Yes, Zenoku works completely offline. You can pick up a puzzle and play for any amount of time without needing an internet connection.
How does the daily puzzle work in Zenoku?
Zenoku features one daily puzzle that is the same for every player worldwide. The difficulty increases throughout the week, encouraging players to build and maintain a streak.
What smart tools are available in Zenoku?
Zenoku includes smart tools such as self-cleaning pencil notes, number highlighting to see all copies on the board, row/column/box highlighting, and undo/erase functions. Hints are also available but cost points.
Does Zenoku require an account or sign-up?
No, Zenoku does not require an account or sign-up. Your progress is saved locally on your device, and no personal data is collected.
How does Zenoku compare to other Sudoku apps?
Zenoku differentiates itself by offering a completely ad-free and subscription-free experience with a focus on a clean, classic design and robust offline functionality.
What is the age rating for Zenoku?
Zenoku has an age rating of 4+. This indicates it is suitable for young children and does not contain content generally considered inappropriate.