Several things could go wrong with in-app purchases. Here are the most common errors and what you can do to resolve them. Also, of course, you can always reach out via the in-app support feature.
I just paid for Premium but I can't access
On rare occasions, this can happen if the purchase succeeded, but the receipts did not reach our servers. To resolve this:
1: Open the in-app purchase screen
2: Scroll down to the bottom and press "restore purchases".
This should sync purchases with our servers. If you run into any issues, please reach out at feedback@repcountapp.com
I changed my Apple ID and now I can't access premium
This is where most in-app purchase errors happen. The reason is that the in-app purchase is tied to your apple id. When switching ID:s apple sees you as a new customer and their receipt isn't valid. If this is the case you need to switch back to your old Apple ID and then restore your purchases.
If you are still having trouble, don't hesitate to reach out at feedback@repcountapp.com. I try to respond within a day.