Lantern Sudoku

Lantern Sudoku is a quiet sudoku for short, calm sessions. It has no ads, no account and no game over, and it works fully offline.

When you're stuck, a hint lights the next step instead of giving the answer away. You choose how much help you want:

• Where to look: the area where the next step is.

• Why: the technique by name, with a short explanation and the cells that matter highlighted.

• The digit, only if you want it.

If a digit on the board is wrong, the hint tells you that first, so you never chase a step built on a mistake.

Honest puzzles

• Four levels: Easy, Medium, Hard and Expert.

• Every puzzle has exactly one solution and never needs guessing.

• Each puzzle is graded by the hardest technique it needs, so a level means the same thing every time.

• More than 11,000 puzzles come with the app. Nothing is downloaded.

A daily puzzle

• One puzzle a day, the same for everyone, with a streak and days played.

• Share a spoiler-free result card if you like. Nothing is shared unless you tap Share.

Made to be easy on the eyes

• Large, clear digits, with a Larger digits option.

• Light, Dark and two high-contrast themes.

• Works with large system text and with TalkBack.

Never punished

• Mistakes can be shown or hidden. A mistake limit is optional and off by default.

• Your game is saved after every move. Undo, redo, erase and notes that tidy themselves when you place a digit.

• A calm summary when you finish, and statistics per level.

Private by design

• No ads, no analytics, no crash reporting, no account.

• The app asks for no permissions, not even internet access.