Sudoku Zen: Classic Sudoku

Sudoku, the way it should feel. Quiet, focused, nothing fighting for your attention.

Every puzzle is generated on your device with exactly one solution, so logic always gets you there. You will never need to guess.

CHOOSE HOW MUCH HELP YOU WANT
Three modes, and the difference between them is how much the game tells you, and when.

Assisted. A wrong digit turns red the moment you write it. The easiest way in, and the fastest way to learn what a mistake looks like.
Classic. Nothing is checked until the grid is full, exactly like paper. Your notes and your reasoning are all you get, and finishing one feels like it should.
Timed. Assisted rules against a countdown. Easy gives you 10 minutes, Medium 18, Hard 30.

Three difficulties sit underneath all three modes, so there are nine ways to sit down with it.

DETAILS THAT MATTER
Pencil notes that work like the margin of a newspaper.
Highlighting for the row, column, box and every matching number.
A number pad that becomes a full dialpad when your screen has room for one.
Hints when you are genuinely stuck. The first is free, more by choosing to watch a short ad.
Separate stats for every mode and difficulty, including your best time.
Close the app mid puzzle and come back to the exact square you left.

DESIGNED TO BE CALM
Ink and paper colours. Generous spacing. No lives, no energy meters, no streak you can break by missing a day. Just sudoku, and as much quiet as you want.