Sudoooku

A Sudoku app that just does what it should — no ads, no pop-ups, no sign-up.

What's in it:

• Infinite puzzles — generated right on your iPhone, every one with exactly one solution
• Three difficulty levels: Easy, Medium, Hard
• Per-difficulty level system so you can see your progress
• Notes, hints, and mistake highlighting — as much or as little help as you want
• Timer and best times for each difficulty
• Your current game saves automatically — close the app, pick it up later
• Fully playable offline
• Clean dark design with hand-drawn graphics
• Available in English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Turkish, Russian, Japanese, Korean, and Chinese

What's not in it:

• Ads
• In-app purchases
• Tracking, analytics, accounts
• Annoying reminders