The Sudoku app

In brief

Available on the App Store (iPhone and iPad) and on Google Play (Android). The app is played in portrait mode, on 4 levels from Easy to Inhuman, or with a grid you enter yourself.

Where to download it

Platform	Listing
iPhone and iPad (App Store)	View on the App Store (new tab)
Android (Google Play)	View on Google Play (new tab)

Links checked on October 30, 2026. The app is not available as a desktop version.

What the app does

Levels: Easy, Medium, Hard and Inhuman, with 100 grids included per level, all with a unique solution.
Custom: enter a grid found elsewhere, accepted if it has only one solution.
Aids: pencil notes, 5 hints per game, an Errors button when the full grid contains conflicts, and three settings: "Flag errors", "Fade used digits" and "Fade conflicts".
Tracking: timer with pause, statistics (games, best times per level, streaks) and the Saves screen.
Display: Light, Dark or System theme; 36 languages to choose from.

Phone and tablet

The images below are screenshots of the current app.

A Hard game in progress in the Sudoku app on a phone, light theme: grid two-thirds filled, given digits in dark and placed digits in blue, Notes, Erase and Hint buttons to the left of the number pad, level and timer at the bottom. — Phone: a Hard game in progress.

The same Hard game in the Sudoku app on a tablet, light theme: large centered grid, Notes, Erase and Hint buttons and the number pad below. — Tablet: the same game.