Is there any reason to have both of these? It seems Barcode Scanner also scans QR codes and Shopper doesn't, so is there anything Shopper does that BS doesn't do? I also already have the Amazon app, which can scan barcodes (but maybe just finds them only on Amazon?) and Goggles, which seems to do a Google search for them. Basically, I'm wondering what the best barcode scanner app is without having to juggle four different ones. Thanks.