IAP, subscriptions and Stripe

Hello,

I am building an app where job seekers will post jobs for contractors, and the contractor can sign up for those jobs. Job seekers will have to pay a fee to post these job. I was going to have a subscription portion will additional features.

I was using Stripe for this, but I was concerned about if I needed to use IAP instead, even though the services will be performed outside of the app.

For this model, do I have to use IAP?
IAP, subscriptions and Stripe
 
 
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