30% commission exclusion for physical products, and tangible services

I'm in the process registering an app on the apple play store. I'm after some information to verify whether or not my services fall under the 30% commission fee to apple or not.

My services include:

Online and face to face classes that students can book and pay for through the app. If anyone can provide me some information on whether my app purchase fall into the physical products or tangible services sector I would greatly appreciate it.

Thank you