title: Google Play/App Store in-app purchase policies
body: <p>I heard from someone that on App Store, everything you sell or anything the user buys, Apple must have their <strong>30%</strong> 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.</p>
  
  <p>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).  </p>
  
  <p>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.</p>
  
  <p>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?</p>
  
  <p>Sorry if my concept of "in-app purchase" is blurred.</p>
  
  <p>Any information on this topic is much appreciated. </p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>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:
  <img src="https://i.stack.imgur.com/I00tk.png" alt="Apple policies">
  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.</p>