Play by filling a 9×9 grid with digits 1-9. Choose from easy, medium, hard, master, or free difficulty modes. Solve puzzles with diagonal, odd-even, or irregular variations. Track progress and adjust difficulty step by step.
Allows users to fill 9×9 grids with numbers 1-9. Tap cells to input numbers. Take notes and use hints. Access unique levels. Track progress and train brain skills.
Solve puzzles with 4 difficulty levels and daily challenges. Use notes, hints, and undos. Customize with colors. Export puzzles as PDF via email. Features symmetric designs and advanced generation algorithm. Compatible with VoiceOver.