To cancel your In-App Subscriptions please follow the instructions below.
1) Tap on Settings within the App and select 'Manage Subscriptions':
2) Tap on the back arrow located in the top left corner:
3) Open the Google Play Store menu and tap 'Account':
4) Select 'Subscriptions':
5) Choose 'Manage' under the Storm Shield app:
6) Select 'Cancel Subscription':
7) Confirm the cancellation by choosing 'Cancel Subscription':