Today’s mobile devices have taken over as the most cost-effective and scalable way to replace legacy hardware solutions, as well as paper solutions, that were both clunky and expensive for users. One taxicab company – Green Cab of Madison – has adopted Apple iPads as their vehicle meter and communication device in their Toyota Prius green cabs. Their iPads are outfitted with a mobile app built on Drupal that enables them to collect real-time vehicle location data, to alert drivers of new calls, and to complete credit card transactions. Promet Source has built the iPad app for Green Cab Madison to help them take advantage of mobile technology and optimize their business. We will describe the module used in setting this system up, as well as discuss many challenges that arose during this project and how we have solved them. We will also discuss the tool selection for programming the iPads, and the pros and cons of native and hybrid solutions.