Daily challenges, seven difficulty levels, 20 variants, technique explanations, photo import — the complete sudoku app for enthusiasts.
Seven levels from Easy to Nightmare. Every puzzle is rated by an actual solver — and the hardest tier is drawn from famously difficult collections.
Hints that teach 70+ techniques — not just which cell to fill, but why. From naked singles to chains, follow how strong players actually think.
Six puzzles a day, the same for everyone worldwide. Finish and climb the daily leaderboard — and keep your streak calendar alive.
Killer, Thermo, Sandwich, German Whispers, Skyscrapers… swap the rules and sudoku is fresh again. Every variant explains its rules in-app.
From Easy to Fiendish, refreshed every day. You and every player in the world get the very same puzzles — finish and see where you rank.
A built-in library organized by difficulty, from warm-ups to notorious monsters. And puzzles from elsewhere are welcome too —
Every variant has its own puzzles and rule explanations.
Free to download. No ads to break your concentration.