What is the difference between unlocking with in-app purchases on iOS and using an activation code?

Using in-app purchases on iOS will directly unlock the corresponding panel, and the activation information will be directly linked to your currently logged-in SimFlyPad account. Therefore, we strongly recommend that you register and log in to your account before making in-app purchases on iOS.

There is no difference in usage and activation validity between them (both are permanently activated). It’s just more convenient to use iOS In-App purchase since you won’t need to input an activation code manually, compared to other activation methods.