Support

Found a bug, stuck on a puzzle, or have an idea? Email [email protected].

It helps to include the puzzle (for example "Hard 12") and your iPhone and iOS version.

Common questions

How do I play? Settings → How to play walks through the rules. In a puzzle, Hint shows the next deduction and why it holds.

I lost my progress. Progress is kept only on your device, so it doesn't follow you to a new phone, and deleting the app removes it.

Will there be more puzzles? Yes. Tap a "More soon" tile in the app to say what you'd like next.