The 30% commission applies to in-app purchases made using the Store Kit framework. Generally, only digital items are sold this way. See https://www.quora.com

The 30% commission applies to in-app purchases made using the Store Kit framework. Generally, only digital items are sold this way. See https://www.quora.com/In-App-Purchase-IAP/Do-companies-like-Groupon-have-to-pay-30-to-Apple-on-all-their-in-app-purchases https://www.quora.com/In-App-Purchase-IAP/Do-companies-like-... or https://developer.apple.com/in-app-purchase/In-App-Purchase-Guidelines.pdf https://developer.apple.com/in-app-purchase/In-App-Purchase-... Hope this helps