My wife and I both downloaded barcode scanner and the key ring app to keep our grocery store, etc discount cards on... I tried mine at the grocery store using self checkout friday and it wouldn't work (I gave up after about 5 tries messing with brightness and scanned the card in my wallet instead). My wife tried hers today at PetSmart and same thing, the guy couldn't get it to read so we fell back to using the real card (luckily we still had them with us).
Is there a trick to using this app in place of the cards?
Is there a trick to using this app in place of the cards?