You can cancel anytime through your Shopify admin. Here’s how:
Log in to your Shopify admin.
Navigate to Settings > Apps and sales channels.
Locate the app you wish to cancel.
Click the three dots (...) next to the app name and select Uninstall from the menu.
Confirm the uninstallation when prompted.
That’s it. Your subscription will stop immediately, and you won’t be charged again.