Challenge players worldwide in daily puzzle-solving competitions
Game Variety
Explore five distinctive Sudoku variations:
- Classic Sudoku
 - Comparison Sudoku
 - Killer Sudoku
 - Math Sudoku
 - Symbol Sudoku
 
Daily Challenges
Compete globally by solving identical puzzles with fellow enthusiasts each day
Unlimited Gameplay
Access an endless supply of puzzles for lifelong entertainment
Key Features
- Five customizable difficulty levels
 - Automatic progress saving
 - Memo function for potential numbers
 - Unlimited undo/redo actions
 - Number bookmarking without limits
 - Multi-language support (English, Korean, Japanese, Simplified/Traditional Chinese)
 - Helpful hints during challenging moments
 - Visual indicators for duplicate numbers
 - Optimized for high-resolution Retina displays
 - Quick memo mode activation (double-tap to switch)
 - Color-coded comparison highlighting
 - Customizable settings for sound and language
 - Direct developer feedback channel