Free
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About
Umeo is a quiet sudoku.
No timers chasing you. No game over. No noisy effects breaking your
concentration. Just the gentle feel of placing a number, and the calm
satisfaction of a board filling up.
A simple sudoku, made for people who enjoy thinking.
FEATURES
• A calm 3D board that stays out of your way: numbers settle softly,
a single ripple spreads. Each difficulty plays under its own sky —
dawn, day, dusk and night
• Difficulty by technique, not by blank count: 400 puzzles
(4 levels x 100), classified by the solving techniques they actually
require. Every puzzle is verified to have exactly one solution
• Beautiful boards: given numbers are laid out in symmetric patterns
• Stuck? Flip the board and glimpse the answers showing through in
mirror writing — a hint unlike any other
• A keepsake for every win: the finished board becomes an engraved plaque
• Notes on a fixed 3x3 grid, undo/redo, optional mistake hiding
• Auto-save; track your progress in the puzzle list
• Fully offline, no account. Your data stays on your device
• Japanese & English
One quiet puzzle at the end of the day.
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What's New in Umeo
1.1.0
July 21, 2026
- New: the Keepsakes room. Your progress quietly fills a shelf of 28 commemorative plaques - Tap a plaque to flip it over and see the date it was earned - Puzzles you have already solved count retroactively - Other small improvements
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