Sudoku Clean - No Ads

Sudoku Clean is a truly ad-free Sudoku app that teaches you to solve with logic, not guesswork. Stuck? Get a gentle nudge first, then the full reasoning: which number goes where, and exactly why. Every hint explains the technique behind the move, so you get a little better with every puzzle. FEATURES • Truly ad-free: no banners, no video ads, no interruptions • Step-by-step hints that explain the logic behind every move • Advanced techniques explained clearly: X-Wing, XY-Wing, Two-String Kite, chains and more • 60+ technique drills to practice one skill at a time • 40+ illustrated guides, from the basic rules to expert strategies • Killer Sudoku with cage-sum hints • Puzzles from easy to expert, plus curated 17-clue challenge seasons • Snap a photo of a paper puzzle and solve it step by step, recognized on your device with no upload • 12 built-in themes, dark mode, or design your own • Notes, auto notes, undo, statistics and game history • Play offline, anytime FOR EVERY LEVEL New to Sudoku? Start with the basics and learn at your own pace. Already an expert? Take on hard puzzles and master advanced techniques. No ads. No distractions. Just Sudoku, logic and steady progress.