Plays in your browser, on your phone or computer. Nothing to install.
A logic puzzle with digits: fill the board with no digit repeated in any row or column, so that the digits in each cage make their target: a sum, a difference, a product or a division. Short, calm games, comfortable to play with one finger.
No guessing. Every board has exactly one solution and is solved by reasoning. If you get stuck, the hint explains the next step in one sentence.
Three modes. Classic with four levels (from 4×4 to 7×7), a Daily challenge with the same board for everyone that grows through the week, and Zen with no timer.
Genuinely calm. No ads, no purchases and no accounts. Your games, stats and achievements stay on your device.
For everyone. Dark, light and high-contrast themes, pencil notes, left-handed controls and a reduce-motion option. In Spanish, Catalan and English.