Disruptive innovations better business performance and society. Scholars have claimed that IT disruptive innovations have revolutionised how firms conduct their business and how people shape their daily chores. We discover how an emerging start-up company (goCatch) achieves a revolutionary and leading edge application system for the taxi industry from inception. This paper explains how goCatch manages its technology and unique business, whilst developing a mobile application and disrupting a virtually monopolistic incumbent. We present a stage model of IT-enabled application development start-up. The contributions of the model are two-fold. First, for theory in understanding how start-ups can deliver a disruptive innovation. Second, for entrepreneurial practice to gain a processual understanding of how these innovations are developed.