Zen Sudoku: Classic Puzzle

Zen Sudoku is a calm, focused sudoku experience designed to clear your mind and sharpen your thinking — no ads, no distractions, just pure puzzle solving.

FEATURES
• 3 difficulty levels: Easy, Medium, Hard
• Notes mode to track candidate numbers
• 3 hints per game to help when you're stuck
• Undo to step back from mistakes
• Best time tracking per difficulty
• Clean, minimal design that's easy on the eyes

HOW TO PLAY
Fill the 9×9 grid so every row, column, and 3×3 box contains the numbers 1 through 9. Select a cell, tap a number, and use notes mode to mark possibilities as you solve.

PREMIUM
Unlock unlimited games for a one-time purchase of $0.99. Try 10 games free, then enjoy 3 free games per day — or go unlimited with Premium.

No subscriptions. No ads. Just sudoku.