How to cancel a subscription (trial)?

1. Open the Play Store on your Android device.
   
2. Tap your profile icon at the top right corner.
   
3. Tap Payments & subscriptions.
   
4. Tap Subscriptions.
   
5. Select the Groovepad subscription.
   
6. Tap Cancel subscription.

More information can be found in this article: https://support.google.com/googleplay/answer/7018481

Please note that your subscription is not canceled automatically after you uninstall the app.