How to view, change or cancel your subscription

iTunes:
  1. Go into your iPhone's settings.
  2. Tap on iTunes & App Store.
  3. Tap on your Apple ID at the top.
  4. Tap on View Apple ID.
  5. Tap the Manage button under Subscriptions.
Google Play:
  1. Tap on the Play Store app.
  2. Select the Menu.
  3. Select My Apps.
  4. Select Subscriptions tab.
For security reasons, the App Store and Google Play Store prohibit developers from directly interacting with your account. Therefore, only you can disable auto-renewal within the app. 

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