Sudoku Zen: Number Logic

Sudoku Zen is a clean, relaxing Sudoku (number place) game with an endless supply of puzzles. Every board is generated by an algorithm on your device and guaranteed to have exactly one solution — so you never run out and never need an internet connection.

Features:

• Endless puzzles across four difficulties: Easy, Medium, Hard and Expert
• Every puzzle is guaranteed to have a unique solution
• Mistake detection with a 3-strike limit, just like the classics
• Pencil notes, smart highlighting and auto-clean notes
• Hints when you get stuck
• Time tracking with best times, win rate and streaks per difficulty
• Auto-save: pause anytime and continue later
• Light & dark themes, English & Japanese
• Fully offline — no account, no sign-in

Relax, focus, and solve. Perfect for a quick break or a long, satisfying session.