Just you and the grid. No extra colors, banners or counters to pull you away. A minimal screen that lets you focus entirely on the game.
Color appears only when it means something: lime — a box is complete or a hint is here, red — the digit doesn’t fit.
Small candidate digits in a cell. When you place a digit, the matching notes in its row, column and box clear themselves.
First it shows where to look. If you need more, it reveals the digit and explains the technique. Three hints per game.
No sounds and no timer. Just a light tap under your finger when you place a digit or complete a box.
One puzzle, new every day.
Digits 1 to 9. Each appears once in every row, column and 3×3 box. The whole idea fits in one diagram.
Single candidate, hidden single, pointing, claiming, pairs and more. Each comes with a diagram, and in-game hints show which one you need right now.
A level is defined by the hardest technique needed to solve it.