Irodoku · Color Sudoku
Sudoku, in full color.
The 9×9 grid you know, reimagined in vibrant hues. Fill every row, column, and 3×3 box with nine unique colors — same logic, no numbers.
- Free
- Four difficulty levels
- No data collected
Challenge
Four levels, from calm to brutal.
Choose Easy, Medium, Hard, or Very Hard. Easier boards start with more colors filled in; Very Hard strips the hints away for a real test. Prefilled squares lock in place, so the challenge stays honest.
Flow
Satisfying by design.
Completed rows, columns, and quadrants come alive with smooth animations. A simple color picker keeps input effortless, and undo or delete lets you fix a slip without breaking your rhythm.
What’s inside
Classic logic, colorful twist.
Everything you love about Sudoku, wrapped in a board that’s a pleasure to look at.
9×9 color grids
The full classic grid, filled with nine distinct colors instead of digits.
Four difficulties
Easy through Very Hard — start relaxed and climb to a serious challenge.
Undo & delete
Made a wrong move? Step back or clear a square instantly — no penalty.
No sign-up, no tracking
Free to play, works offline, and collects no data whatsoever.
Your data
No accounts. No tracking. Just puzzles.
Irodoku runs entirely on your device. The developer collects no data — there’s nothing to sign up for and nothing to opt out of.
- No data collected — confirmed on the App Store privacy label
- Plays fully offline — no connection required
- No advertising, no third-party analytics, no tracking SDKs
- Free to download — rated 4+ for all ages
Color your logic.
Four difficulty levels. Endless colorful boards. A quick puzzle fix or a real brain-teaser — free on the App Store.
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