Challenge yourself daily against a global community of Sudoku enthusiasts! This app offers five distinct Sudoku variations: Classic Sudoku, Comparison Sudoku, Killer Sudoku, Calculation Sudoku, and Symbol Sudoku. Enjoy unlimited puzzles and a lifetime of gameplay with a feature-rich experience.

Key Features:

• Five Sudoku Types: Experience the variety of Classic, Comparison, Killer, Calculation, and Symbol Sudoku.
• Daily Sudoku Challenge: Compete daily with players worldwide on the same puzzles.
• Unlimited Puzzles: A seemingly endless supply of puzzles to keep you engaged.
• Adjustable Difficulty: Choose from five skill levels to match your expertise.
• Auto-Save: Your progress is automatically saved, allowing you to resume where you left off.
• Candidate Number Memo: Enter potential numbers in cells to aid your solving process.
• Unlimited Undo/Redo: Easily revert mistakes with unlimited undo and redo capabilities.
• Unlimited Bookmarks: Save your progress at multiple points for easy navigation.
• Multilingual Support: Available in English, Korean, Japanese, and two Chinese dialects.
• Hint Function: Get assistance on challenging cells with the built-in hint feature.
• Duplicate Number Highlighting: Duplicate numbers are clearly identified to prevent errors.
• Retina Display Support: Enjoy crisp, clear visuals on Retina displays.
• Intuitive Memo Mode: Double-tap to switch to memo mode for easier note-taking.
• Comparative Number Highlighting: Cells requiring comparison are color-coded for clarity.
• Customizable Settings: Adjust sound effects, language, and other preferences.
• Feedback Function: Share your feedback and report bugs directly to the developer.

Version 1.12.0 (July 31, 2024): This update includes bug fixes and several feature improvements.