I use my own apps for qr code ;p but I did try scanlife to scan normal barcode and it work 40% of the time. I wish there was a good barcode(not qr code) scanner like there is on android, but hey, at least we have the lib from google.
it is quite simple to scan a barcode, just add a barcode scanner on your mobile phone or other devices. but first you need to know what barcode are you going to scanner. if it is QR code, just use this QR code reader to scan codes for you.
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