Learn to solve Sudoku, step by step.
A calm Sudoku course for adults: eight levels from your first puzzle to X-Wings, hints that explain why, and practice that targets the technique you are learning.
Coming soon to the App StoreA real course
Eight levels with clear "I can" goals, a short placement test, level exams, and a private certificate for each level you pass.
Hints that teach
First a nudge, then an animated walkthrough of the logic on your own board, and only then the answer.
Practice that targets you
Spot-the-technique drills, puzzles built around the technique you are learning, and spaced reviews so skills don't fade.
Calm and readable
No ads during a puzzle, no three-mistake rule, large buttons, and layouts for iPhone and iPad in portrait or landscape.