Your subscription renews automatically at the end of every period (weekly, monthly, yearly, or otherwise) until you cancel.
Payment is charged to your Apple ID / iTunes & App Store account when you confirm your purchase — by Touch ID, Face ID, or any other method shown on Apple's pop-up screen. If you have a free trial, payment is charged after the trial ends.
How to Cancel
You can cancel your free trial or subscription at any time by turning off auto-renewal in your Account Settings.
To avoid being charged, cancel at least 24 hours before your free trial or current subscription period ends.
Only you can manage your subscriptions. Deleting the app does not cancel your subscription. If you use iOS 13 or later, Apple gives you a quick option to manage subscriptions when you delete an app.
How to Request a Refund
If you purchased through the Apple App Store and want a refund, you must request it directly from Apple. Follow the instructions on the Apple Support page to submit your refund request.
Important
Please take a screenshot of this page for your records. It will help you manage and track your subscriptions.