Not Evil Sudoku is a clean, minimalistic, offline, and totally ad-free sudoku app for your iPhone. Tired of the spammy sudoku apps playing ads every few moves? This app is for you. Just a beginner? No problem, turn on move by move validation in the settings to help you along. Features: - Fully offline - 3 difficulty modes: easy, medium, hard - Theming: Change the color of the numbers - Take notes while you puzzle over what number to select - Undo moves you no longer like - Hints if you need them - Hide the timer if time pressure isn’t your thing - A streak to motivate you - See your best time across difficulty modes - Doesn't track you - Light & Dark mode - Unlimited Games (Plus, Pro) - Charts to see your progress over time AND over difficulty (pro) - Fun alternate app icons to liven up your home screen (pro)