The new In-app scanner allows you to use the device's camera as a barcode scanner.

This in-app scanner is supported on most pc and mobile browsers. 

However, it is limited to the Safari browser for the iPad and iPhone users.

This in-app scanner is also not supported in the Shopify mobile app.

You just need to navigate to Quick Scan with your browser.

Next, click on the Camera icon to allow your camera to be used as a barcode scanner.

You can start scanning by displaying the products' barcodes in front of the camera.