This is Sudoku for a quiet moment. There are no loud sound effects or windows popping up incessantly.
• Puzzle of the Day — Everyone solves the same problem. Consecutive records build up.
• Four Difficulty Levels — Easy / Normal / Hard / Expert. All are solved using logic alone (no guessing).
• Auto-Finish — If all remaining cells have the same number, the app fills them in for you to finish the board. You can turn this on and off.
• Comfortable Font and Color — 4 font sizes and 4 colors. Selecting High Contrast makes the numbers clearer.
• Solve Together — Compete with others who know the link to see who can match the same problem.
• Records are saved on this device. No account or login required.
There is only one rewarded ad, which you watch once when opening a new color (Dawn). Ads do not appear during gameplay, and there are no banner or interstitial ads. Hints, puzzle counts, and difficulty levels are all free.
© 2026 PPAI Lab · Sudoku
Contact: ppai.lab.ppaceo@gmail.com
One game a day. A neat Sudoku solved solely by logic. Choose your font size and color and play at your own pace.