Sudoku Zen
Four puzzles every day — Easy, Medium, Hard, Extreme — the same on every device. Hints that explain themselves before they apply themselves. Seven themes so the board can match the room. A streak that's worth keeping.
Pick a difficulty in the morning, finish it on the train. Skip a day and the archive remembers. The board stays quiet so the puzzle can be loud.

What it actually looks like
Every shot here is from the real game on a real phone. The board doesn't get redesigned for the marketing page — what you see is what you'll be holding.
Easy, Medium, Hard, Extreme — four puzzles every day, the same on every device. They show up in the morning, sit on the home screen, and don't ask you to pick a setting first.

Three mistakes per board. Auto‑check optional. Notes for the corners. A timer that doesn't shout at you. Tap a number, tap a cell, undo if your thumb slipped — and the keyboard never gets in the way.

Stuck on Hard? The hint flow says exactly enough. First a nudge ('look at row 4'). Then the technique name. Then the why. Then a button to apply it. The longest path is one tap. The most fun path is the one where you read the why.

Morning Paper. Midnight Glass. Sakura. Ocean. Forest. Classic Ink. High Contrast. Seven curated themes that change the table, the numbers, and the mood together. Follow system theme if you want it to switch with the lights.

An archive that knows what you finished. A stats screen with best times per difficulty, current streak, longest streak, and a circle that fills in as you collect achievements. The kind of progress page you might actually open.

A few things you might miss at first glance
Sudoku Zen wants you to come back tomorrow. The small things below are how it earns that.
Same date, same difficulty, same puzzle on every device — offline, every time.
Nudge first, technique second, the why third, the apply last. You decide when to stop.
Seven curated palettes from Morning Paper to High Contrast. Follow system theme on tap.
Large numbers, large text, reduced motion, and a high-contrast theme that doesn't look like a downgrade.
Prelaunch list
Sudoku Zen lands on phone, tablet, TV, and desktop. Drop your email — we'll send one quiet confirmation and then nothing else until the first daily is live.