I'm not sure you read the previous comments - Apple in fact forces you to use their in app payment system for subscription fees and pay them a cut, or be left with no in app payment system at all.
That’s not true. I have used plenty of apps that have subscriptions but don’t use in app subscriptions including Sling, DirecTVNow, Linux Academy and Spotify.
But the IAP rule for Apple only applies to purely digital goods. If Tinder also sends you a condom with your profile upgrade, they don’t have to pay Apple anything. (This is why Amazon’s main app lets you buy real-world goods)
The key thing is that you can set up a separate website for payments with iOS devices, but you can't embed or link to that website within your iOS app. I've seen apps rejected because their technical support website was linked from the app and the header of that website got you to the payment website after like 10 clicks.
Neither Google or Apple do that.