Shopify handles the app's billing, and they'll automatically cancel the app subscription as soon as it's uninstalled from your Shopify store.

To uninstall the app from your store, please follow the steps below.

1. In the Shopify Admin, click the "Settings" link at the bottom left of the page:

2. Click "Apps and sales channels":

3. Click the "Uninstall" link for the app.

Once the app has been successfully uninstalled from your Shopify store, Shopify automatically cancels the app subscription.