I keep seeing video's and hearing people talk about an app that lets you scan all your store cards into your phone and when you go to the food store or Old Navy they scan your store card on your phone and not your keys. I have done a lot of looking and can not find a good app. does anyone know what a good app is for this. ...I know that this will be a built in feature in the next iPhone update, but I want something for now. any thoughts, ideas, please?