I\'m developing an iPhone app with a subscription model, and I saw this iOS PayPal library: Apple takes 30% of revenue of everything, but PayPal takes significantly less for
There are things that you could sell by paypal in iphone apps, imagine that your app exists to promote your business, and not that your app IS your business. I mean...you have a library and use app as another channel to sell the books, or you have an hotel and use app to reserve and then pay the room! In that case you can use paypal.
You cannot use paypal, but you have to use instead in-app purchase, if you sell some additional feature for you app...
I hope this helps