The in app purchase is the worst system ever, the items you purchase are assigned to a specific vault slot instead of your account, that means when you delete your vault, by accident or by purpose, the items you bought are gone forever and there's no way on getting them back! That's what happened to me, I deleted the vault by accident and the Mr. Handy I bought is gone for good, luckily I just spent $0.99 on that article, but can you imagine buying more than that? I don't know if this was developed like that on purpose or it was an accident, but to me, it sounds like a way to rip off some dollars from us players!!! Behesda really needs to fix this ASAP.