"Book notes" ios-in-app purchases

The store kit framework is an in-app payment engine. With this framework, paid apps can realize the ability of users to pay for content (for example, to get extra content)

If you find that the store kit framework is difficult to use and the in-app payments do not require server-side support, you might consider using the Mkstorekit framework developed by Mugunth Kumar, which is hosted on the GitHub website, The framework encapsulates an in-app payment framework for Apple and is constantly updated with Apple updates, with high code quality, active development, and I use this framework myself, and I strongly recommend that you use it.

Reference "iOS Programming Guide"

"Book notes" ios-in-app purchases