Manage or cancel subscrption
Where you manage or cancel depends on where you subscribed. Check Settings > Account to see the subscription provider.
If you subscribed via the website or browser extension
Follow the "Manage subscription" link in the Settings page within SwiftRead to cancel your subscription or manage it, such as to change your payment method.

If you subscribed in the iOS or Android app
Follow the instructions above while using your app and click on the "Manage subscription" link.
If you do not see it, follow the official store instructions for managing your subscription directly:
iOS: https://support.apple.com/en-us/118428
Android: https://support.google.com/googleplay/answer/7018481?hl=en&co=GENIE.Platform%3DAndroid