If Joe's Diner gives you a free slider every ten meals, you may no longer need to schlep around a punch card if you use PayPal. It's latest iOS app now works with loyalty cards from select retailers just by scanning a barcode on your physical card. That'll save it into your PayPal wallet in a similar way to Apple's Passbook and Microsoft's Wallet, letting you score discounts or other deals. The company also squashed a few bugs and killed the old-school check-scanning feature. So far, the update applies only to iOS devices, but we'd imagine it'll hit Android soon as well.