You can cancel the recurring payment for your Plan in the App Store on Mac.
- On your Mac, open the App Store app.
- Click your Apple ID at the bottom of the sidebar.
- Click View Information at the top of the window. You might be asked to sign in with your Apple ID.
- On the Account Information page, scroll to the Manage section. To the right of Subscriptions, click Manage.
- To the right of iStudiez Pro Subscription, click Edit.
- Use the options to manage your subscription.
If you cancel, your subscription will stop at the end of the current billing cycle.
Please follow this link to read more: