Hi, I want to add IAP and a store that uses currency you can ear in game. In addition you can purchase more currency with real money (IAP). I know that you can test to see if the user has purchased an item, but how can I protect them from clearing their cache or re installing? My fear is that someone will spend $1 for 1,000 of in game money, and potentially lose that 1,000 if they have to clear their cache for some reason. Is there a way to protect them from this without having to set up servers?