Not Evil Sudoku 4+

A joyful sudoku-solving experience built natively for iPhone and iPad. Whether you're a casual solver or a sudoku pro, there's a difficulty mode for you.

Optimized for a zen solving experience free from bloat and distraction. Stuck on a puzzle? Shake your phone for hints and turn on move by move validation in settings to get immediate feedback on your solve.

Play a daily puzzle at a difficulty of your choice and see where you stack up with players across the globe.

Key features:
- Fully offline: no internet required
- No ads or distractions
- Real-time move validation to get immediate feedback
- Shake for a hint on the next logical move
- Leaderboards with assist tracking
- Easy, Medium, and Hard difficulty levels
- Light/Dark mode
- Stopwatch and best time tracking
- Notes: Keep track of candidates
- Auto-clear Notes: removes candidate numbers automatically in row, column, and box when they become outdated
- Speed demon: Lock numbers and place them in multiple tiles at once
- Arithmophobia: Sudoku with letters instead of numbers
- Daily streak tracking
- Daily reminder notifications
- Highlighter: tap a number to highlight all its instances on the board
- Themes to customize the interface (some require Pro)
- Alternate app icons (Pro)
- Charts and statistics (Pro): track solve speed over time and puzzle count by difficulty

Play the daily puzzle at your preferred difficulty for free without any limits on assists or game features. Upgrade to Pro with a one-time purchase to unlock unlimited games, detailed stats, more themes, and alternate app icons. Pro supports Family Sharing.