Solve puzzles with unlimited generated grids. Choose from six difficulty levels. Features a vintage 1920s design. Offers a clean interface for focused play. Provides mental exercise and entertainment. Available offline for anytime use.
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.
Play with customizable difficulty levels from easy to expert. Track mistakes and highlight duplicates. Use a straightforward toolbar for common actions. Enable Pro Mode for no hints. Pencil in potential numbers. Receive hints when stuck.