Sudoku That Teaches
Difficulty rated by the techniques a board actually demands — never by how many cells are blank. Every puzzle has exactly one solution, and none of them need a guess.
1
Solution per puzzle
3
Levels of hint
4
Board sizes
100%
Offline
Most sudoku apps decide difficulty by counting blank cells. It is the wrong measure — a board with fifty blanks can fall apart in two minutes while one with thirty fights back for an hour. Sudoku Master rates a puzzle by the solving techniques it actually requires, so an Expert board is genuinely expert.
Every puzzle is generated with exactly one solution and is solvable without ever guessing. If you are stuck, the answer is always somewhere on the board.
And when you cannot find it, the hints teach rather than tell. They come in three stages — where to look, why the logic works, then the answer — and the Sudoku Academy turns those same techniques into a proper course, from naked singles up to the patterns that crack the hardest grids.
Locate the spot, explain the technique, then reveal. You choose how much help.
Scored by the logic a board demands, not by counting empty cells.
Killer Sudoku plus 4×4, 6×6, 9×9 and 16×16 grids.
No account, no sign-up. Everything runs on your phone.
The hints
A hint that just fills in a cell teaches you nothing. Each stage gives away only as much as you ask for.
Points at the region worth looking at. Often that is all you needed.
Names the technique and walks the deduction, so you can finish the step yourself.
Fills the cell in — the last resort, not the first.
The grids
Classic sudoku is the centre of the app, with room on either side of it — a four-by-four for two minutes on a bus, a sixteen-by-sixteen for an evening.
Warm-up
4×4
A couple of minutes, and a gentle way in for new players.
Compact
6×6
Real deduction on a board that fits a coffee break.
Classic
9×9
The full range, from Easy through to techniques-only Expert.
Marathon
16×16
Sixteen symbols per row. Bring time.
Beyond the grid
A technique course that turns the solver in your head into something deliberate.
Daily streaks, experience and achievements that track how far you have come.
A full collection of board themes, because you will be staring at it for a while.
Publisher
Arcadly
Release Date
2026
Platform
Android
Genre
Puzzle