Support
Last updated: 8 August 2026
Most questions are answered below. If yours is not, write to us and we will reply within two business days.
I measured the diagram and got a different answer.
Figures in Gonio are not drawn to scale. They are laid out to keep every label readable, not to be measured with a protractor. Solve from the marked values and the geometric rules; a figure that looks like a right angle is only a right angle when it carries the small square mark.
I bought a pack but it is not unlocked.
Open Settings inside Gonio and tap Restore Purchases while signed in with the Apple Account you used for the purchase. If the content still does not appear, email us with the approximate date of purchase.
How do I cancel my subscription?
Cancellation is handled by Apple, not inside Gonio. On your device open Settings, tap your name, tap Subscriptions, select Gonio and tap Cancel Subscription. Cancel at least 24 hours before the renewal date to avoid being charged for the next period.
I changed phones and my progress is gone.
Progress is stored on the device and is not backed up to any account, so it cannot be transferred between devices or recovered after deleting the app. Your purchases can still be restored on the new device with Restore Purchases.
A puzzle looks impossible.
Every puzzle is checked by a solver before it ships, and only puzzles whose target angle is fully determined by the marked values are included. The information on screen is always enough. If a chain will not open, take a hint: it points at the rule to apply next and the angle it settles.
I think an answer is wrong.
Send us the puzzle number and a screenshot. Puzzles are generated deterministically from the puzzle number, so we can reproduce exactly what you saw and check it.
Do I need to be online?
No. Gonio needs a connection only when you make or restore a purchase. Everything else, including generating new puzzles, happens on your device.
How do I delete my data?
Deleting the app removes all local data. We hold no data about you on our own servers, so there is nothing further to delete.
Contact us
Write to support@keremkarayagiz.com.tr. To help us answer quickly, please include your device model, your iOS version and the puzzle number if your question is about a specific puzzle.