GridZen Sudoku - Sudoku Puzzle

GridZen Sudoku brings a clean, focused puzzle experience to iPhone and iPad, with classic Sudoku and a collection of rule variants for players who want something deeper than the standard grid. Choose from four difficulty levels, solve a fresh Daily Challenge, track your fastest times, and build streaks as you improve. Whether you play for a few quiet minutes or chase expert-level records, Sudoku keeps the board clear, responsive, and easy to read. Features: - Classic Sudoku with uniquely solvable puzzles - 8 game variants: Classic, Diagonal, Windoku, Center Dot, Asterisk, Anti-Knight, Anti-King, and Jigsaw - 4 difficulty levels: Easy, Medium, Hard, and Expert - Daily Challenge with streak tracking - Notes mode for candidate numbers - Undo, erase, and limited hints - Error highlighting and game-over rules after 3 mistakes - Row, column, box, and matching-number highlights - Auto-save and continue game support - Fastest-time records by difficulty - Detailed statistics, win rate, win streaks, and variant records - Haptic feedback for correct moves, mistakes, and completion - Multiple languages with instant switching GridZen Sudoku is designed for clarity, speed, and long-term replay. Every puzzle is generated with a unique solution, so each game rewards careful reasoning instead of guessing. Download GridZen Sudoku and make every grid a small logic victory.