Store Reward Card Barcodes On Android Phones

In a previous post I wrote about a number of ways that a smartphone can help with shopping. Today I learned about two Android apps, CardStar and Key Ring that you can use to store all of your different reward cards. In most cases all that is needed on the card is the bar code, which the cashier scans when you check out. With Key Ring you can scan the barcodes on the cards and store the barcodes on your phone, then when you checkout, have the cashier scan the barcode on your phone.