Support

We usually reply within a few days

Found a bug, have a question, or want to suggest a feature? We'd love to hear from you.

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Before you write

Please mention your device model and OS version.
For leaderboard issues, include your player handle (shown on the leaderboard, e.g. "Player-A1B2C").
Screenshots help a lot for visual glitches.

My progress disappeared. Game progress is stored on your device, so uninstalling the App removes it. Cloud backup is on our roadmap.

How do hints work? You get 3 hints per game. Each hint places a logically provable number and explains the reasoning step by step.

When is the Daily Challenge refreshed? At midnight UTC — everyone in the world gets the same puzzle each day.