I am developing an app with in-app purchase. I heard people talking about Parse. Can someone provide some information how much of the security do Parse offer compared to normal StoreKit IAP without receipt validation and without using a server? The receipt validation and servers are topics I don't understand and because of that I tend to use some sort of IAP without it. Any information is appreciated.
Parse verifies receipts for file downloads where the purchased file to download is hosted with parse, but not for 'simple' IAP purchases (which yours is).
Technically there is nothing stopping you from adding a small basically empty file which is downloaded after the purchase so that the verification is run and then you enable your features if you can download the file.