← About the app

NumZen Support

We usually reply within 1–2 business days.

Contact

2645809444@qq.com

Please include your iOS version and a short description of the issue. Screenshots help a lot.

Frequently asked questions

What is free and what is paid?

The daily challenge (all of it) and 5 practice puzzles per day are free forever. Premium is a one-time purchase that unlocks unlimited practice, harder difficulties, and full statistics. There is no subscription.

Why don't hints give the full answer?

By design. Hints explain strategy and, at most, one concrete next step — solving the puzzle yourself is the point.

How do I restore my Premium purchase?

Open Settings inside the app and tap "Restore Purchases" with the same Apple ID used for the original purchase.

Where are my streaks and statistics stored?

Locally on your device only. Deleting the app permanently deletes its data.