I heard from someone that on App Store, everything you sell or anything the user buys, Apple must have their 30% on it. That would imply that even if you open a web page within the app and accept a donation, Apple must have its percentage. Otherwise you would have to redirect the user to make this donation outside of the app - for instance, calling the browser.
So, if it's true, I wanted to know if Google holds the same policies. I couldn't find this specific answer in the documentation, just info about in-app purchase (but I'm considering that scenario a purchase within the app, but not IN the app itself (sorry if it sounds confusing).
Taking Groupon as example. If you buy a coupon, is it an "in-app purchase"? I don't believe Google would take 30% on everything you buy there, so I just wanted to make sure it is according to their rules.
The app I'm working on will have both donation and coupon purchase from sponsors (Walgreens, etc). Is it ok if I do this through a WebView, or would I have to actually call the browser?
Sorry if my concept of "in-app purchase" is blurred.
Any information on this topic is much appreciated.
EDIT:
From my understanding, In-App Purchase (for both Google and Apple) is like an API that you use to process these payments.
What I find confusing is that, for instance, in the Apple's In-App Purchase Guidelines:
So, does it mean I cannot use Apple's In-App Purchase to sell my book (but could open my e-commerce site in the app and sell it), or I cannot sell my book at all inside my app?
I know it may sound like a dumb question, but it doesn't seem so clear to me.
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