Sudoku | No ads

Sudoku is a quiet, native puzzle for focused solving. Work through five fair difficulties, from Gentle to Expert. Every puzzle is generated or recovered on your device, checked for a unique solution, and rated by the logical techniques it requires—not by clue count alone. FEATURES • Five difficulty levels: Gentle, Easy, Medium, Hard, and Expert • Unique-solution puzzles with technique-based difficulty rating • Notes and pencil marks, with optional automatic note removal • Undo and redo • Optional mistake checking and conflict highlighting • Staged hints that explain the technique, not just the answer • Pause that ignores inactive and background time • Local statistics and settings that stay on your device PRIVACY BY DESIGN Everything stays on your device. Sudoku works without an account or an internet connection and includes no ads, tracking, subscriptions, or in-app purchases.