Killer Sudoku

Killer Sudoku is a calm, modern take on the classic cage-sum number puzzle, built for people who love a fair, thoughtful challenge without the clutter.

Every puzzle is generated right on your device and is guaranteed to have exactly one solution that you can always reach with pure logic. No lucky guessing, ever. Play completely offline, anywhere, with no account, no sign-up, and no internet needed to solve.

WHY YOU'LL LIKE IT
- Truly infinite puzzles: a fresh board every time, across four difficulties
- Guaranteed unique solution, solvable by logic alone (every puzzle is verified)
- Big, high-contrast board and large numbers that are easy on the eyes
- Four difficulties: Easy, Medium, Hard, and Expert
- A new Daily Puzzle every day, with a streak counter
- Pencil notes, mistake highlighting, undo, and a cage-combination helper
- Calm, non-intrusive ads, never while you are solving a puzzle

HOW KILLER SUDOKU WORKS
Fill the grid so every row, column, and box contains the digits 1 to 9. Each dotted cage also shows a target sum, and the digits inside a cage must add up to it with no repeats. It is Sudoku with an extra layer of arithmetic deduction.

MADE TO BE COMFORTABLE
Large print, clear colors, generous tap targets, and a quiet interface make long solving sessions relaxing, whether you are a lifelong Sudoku fan or just getting started.

Your progress, best times, and daily streak are stored only on your device. Download once and play forever.