Zen Sudoku: Classic Puzzle

No ads. No accounts. Just pure sudoku. Unlock unlimited puzzles for a one-time $0.99.

Zen Sudoku is a clean, distraction-free sudoku app designed to help you focus and unwind.

Fill every row, column, and 3×3 box with numbers 1–9 — no duplicates, no distractions.

FEATURES • Three difficulty levels: Easy, Medium, Hard • Notes mode to mark candidate numbers • Undo to step back freely • Hints when you're stuck (3 per game) • Timer with best time tracking per difficulty • Fully offline — no internet needed

NO ADS. NO ACCOUNTS. NO TRACKING. Zen Sudoku is completely private. No sign-in, no data collection, no ads — ever.

FREE TO TRY Enjoy 10 free games plus 3 bonus games every day. Love it? Unlock unlimited play forever for a one-time $0.99.