From paid app to free inapp purchase on Google Play

Question

I want to make my paid app a free app with inapp purchase, but I want that all people that have just bought the app don't have to pay again the inapp, is there a way to do that? Is there some official documentation to read? I have searched a lot but without luck.

Best regards

Answer 1

One possible tricky method should be notifying current users to sent you their google email account. By putting google email account into test account, there will be able to purchase in-app purchase for free.