Support
Last updated: 7 August 2026
Most questions are answered below. If yours is not, write to us and we will reply within two business days.
I bought a pack but it is not unlocked.
Open Settings inside Fulcro 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 Fulcro. On your device open Settings, tap your name, tap Subscriptions, select Fulcro 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.
I worked out a different set of values and it was rejected.
Every puzzle is generated so that exactly one set of values satisfies all the scales. If a second set genuinely works, the puzzle has an error: send us the puzzle number and a screenshot and we will investigate.
A puzzle looks impossible.
Each puzzle is checked by a solver before it ships, and only puzzles with exactly one solution are included, so the information on screen is always enough. Read every scale before deciding — one of them usually pins down a single symbol on its own.
Do I need to be online?
No. Fulcro 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.