Usage of a third party (stripe) to charge subscription on my app

if my app was made to manage a physical device (an intercom) and offer services to family groups and individuals. In order for them to use the app they'll need a subscription.

  1. My question is, Can I use the third party vendor (Stripe) to charge my user or will it have to be with the in app purchase (IAP) one?

  2. if it has to be through IAP will I have to pay the 30% fee per transaction?

Usage of a third party (stripe) to charge subscription on my app
 
 
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