HOW IT WORKS - Just download the free ap by searching ” buycott ” once you have it you can ” sign in using facebook ” then there is a large list of items you can avoid eg. Gmo, halal etc. Just select halal(and any others you wish). Once you have done this you can scan any barcode and it will tell you if it conflicts with your selection. It is not 100% accurate but is better than nothing. There is a report in accuracies option to use to help build up the data base, please use it.