A portable system, for use in projecting proprietary host-data-based output to a host device using a dual-layer proprietary-data-provision arrangement including the host device and portable system. A storage component includes one or more first-layer components, of the dual-layer proprietary-data-provision arrangement, that, when executed by a hardware-based processing unit, communicates with the host device by a first wired communication channel or a first short-range wireless communication channel to receive the proprietary host data from the host device. The storage also includes a portable-system application that, when executed, generates, based on the proprietary host data, proprietary host-data-based app output. And the storage includes one or more second-layer components, of the arrangement, that, when executed, communicate with the host device by a second wired communication channel or a second short-range wireless communication channel to provide the proprietary host-data-based app output to the host device for rendering at the host device.