Apple In App Subscriptions
If you are offering an iOS version of your app, you can choose to use Apple's In App Subscriptions to charge you customers.
Click your app
Under In-App Purchases on the left hand side, click Manage.
Then click to add a "Auto-Renewable Subscription"
Create one for month and one for year
Select the product id as com.trainername.appname.month and com.trainername.appname.year
Copy these two product ids to the "Subscription Plans" section.
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