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.