You need to follow the below steps:
- Open the App
- Navigate to the subscription section
- Choose the subscription
- Confirm Payment: You'll be redirected to the Apple Store payment page. Here, review the subscription details and confirm the payment by following the on-screen instructions.
- Complete Subscription: Once the payment is processed successfully, your subscription will be activated.
A couple of things to remember:
- The auto-renewal will kick in 24 hours before the end of your current billing period.
- You can turn your auto-renewal off from your Apple Store account at any time after.
- Once you sign up through Apple, you will only be able to manage your payment through your Apple account.