present day versions of Android and iOS have a created-in QR code scanner. You don't really need to download any apps---just open the camera on the cellular phone and point it in a QR code. QR codes may also be present https://heidixsct104474.blogacep.com/33675691/how-much-you-need-to-expect-you-ll-pay-for-a-good-qr-codes-for-business