Sudoku Klassik

Sudoku Klassik is a clean, fast Sudoku without annoying ad interruptions between rounds. No account, no cloud, no subscription — your stats stay on your device. Pick your difficulty, solve unlimited puzzles with a guaranteed unique solution, and track your progress. A new challenge waits every day, letting you compete against your own best time. Features: 4 difficulty levels: Easy, Medium, Hard, Expert Unlimited, unique puzzles Notes/pencil mode Error checking (optional) Daily challenge with personal best-time comparison Stats: best times, puzzles solved, streak Light and dark mode No interstitial ads — just a discreet banner No sign-up, no hidden costs. Sudoku Klassik focuses on what matters: a good puzzle, without distraction.