Scanning a barcode is fast and easy. Barcode Scanner continuously scans the viewfinder rectangle, so there's no need to press the shutter button. Just move the phone until the barcode is completely inside:
If you're having trouble, make sure to hold the phone steady. If the camera is unable to focus, try moving further back from the barcode.
When a barcode is found, the phone will beep and take you to the results screen, which describes what you found, and offers a choice of actions. Learn more: