I tried to restore my earlier purchase but it didn't work. What should I do next?

🔍 First, don't worry. Both Apple and Google save your purchase history and will not require you to ever rebuy the same in-app purchase again (except for something like the Time Machine which can be bought multiple times).

The trick here is to make sure you are signed in using exactly the same Apple ID or Google Play Services account that you used when you made your original purchase. Be sure to triple check that and then try restoring your purchase again.