As mobile technology continues to advance, it possesses advantageous characteristics (e.g. universality and versatility). The goal of this research is to develop an electrochemiluminescence (ECL) immunosensor that is powered and operated by a mobile device. The biosensor consists of a screen-printed electrode, and uses the mobile device camera to capture the visible ECL reaction. We have developed a finalized electronic circuit that alters the audiojack voltage of the mobile device, supplying power to the biosensor. Currently, we are developing a mobile application, and assembling a marketable prototype. This device has potential applications in education, research, and medical diagnosis.