The present invention related to human/computer interfaces and more particularly to a headset computing display device that accepts voice commands and tracks head motions to provide command inputs to and receive display information from a software application executed on a host computing device. An example embodiment of the present invention includes a method of, and corresponding system for, operating a native Smartphone or PC application, simultaneously displaying an output of the application through the Smartphone or PC screen and a headset computing display device, and using speech and head tracking commands to control the native application. The present invention enables hands-free operation of a Smartphone or PC application.