Sudoku Ultra: Daily Puzzles

Sudoku Ultra is a clean, modern take on the classic number puzzle — a fresh daily board plus unlimited practice puzzles, tuned for complete beginners and seasoned solvers alike.

Difficulty that actually means something. Every puzzle is rated by the solving techniques it requires, not just how many numbers are missing:

• Easy — naked singles only, a gentle place to learn
• Medium — hidden singles and pairs
• Hard — locked candidates and triples
• Expert — X-Wings, Y-Wings and Swordfish
• Diabolical — for solvers who want a real fight

Each level eases you in and ramps up gradually, so you’re always challenged but never stuck.

FEATURES

• A new daily Sudoku, plus unlimited extra puzzles any time
• Five genuine difficulty levels
• Pencil/candidate marks, undo, erase and limited hints
• Track your streak, star ratings and best times
• Choose your symbols: classic numbers, letters, shapes or zodiac signs
• Light and dark themes
• Play completely offline — no internet needed
• Optional daily reminders so you never break your streak

Whether you have five minutes for a quick board or an hour for a diabolical grind, Sudoku Ultra grows with you. Sharpen your logic, beat your best time, and keep your streak alive.

Sudoku Ultra is free to play and supported by ads. An optional one-time upgrade removes ads.