Because Apple manages all subscriptions purchased through the App Store, you'll need to follow these instructions on your iPhone in order to cancel your free trial:
- Go to Settings on your iPhone
- Tap Your Name at the top of the screen
- Tap Subscriptions
- Find the Dipsea subscription
- Tap Cancel Subscription. If you don’t see Cancel Subscription, the subscription is already canceled and won't renew
Note: A free trial must be canceled before the trial's end in order to avoid a charge from Apple (iPhone) or Google (Android). If you've been charged and would like to request a refund, you can find instructions for requesting a refund from Apple here and from Google here
To learn how to cancel a free trial on an Android device, click here.