A generic application that ASSA ABLOY® Hospitality publishes in the App Store and Google Play. Through an administration portal, the hotel can customize the graphics of its mobile key that will have a style inspired by "Passbook" thereafter. ASSA ABLOY® Hospitality offers the basic structure of the application with a software development kit that allows the client to easily complete the application with its own style and appearance and publish it on the App Store / Google Play as the version of its own brand.