It would be so nice if we could use the built-in cameras on our iOS devices (iPads and iPhones) to scan barcodes and QR codes for checkin.   We already use MinePass and barcodes for certain scenarios and the iOS devices are cheap and work great and seem to be the most bulletproof solution we have.  It would also make it easier for us to sell tickets to certain events/concerts and allow our volunteers to simply download an app and scan codes as people come in the door.  Thanks!