Simply follow the simple steps below to scan barcode from iPhone:  Download and install a barcode scanner. You can download one from the Apple App Store. Open the app and register if required. Tap the large barcode icon on the centre of the screen. The position may be different, depending on the app you downloaded. Grant permission to the app to access your camera when the request pops up. Position the barcode within the camera frame. Remember to look out for the start and stop points. Once your scanner captures the barcode accurately, it'll automatically interpret the data embedded in the code. If the code contains a menu, it'll open the menu page.