The ubiquity and rapid advances of mobile health technology (mHealth) and wearable health and well-being technologies offer exciting opportunities for individuals, groups, and communities to actively engage in care. While the area of mHealth is attracting much attention from researchers and practitioners now a days, many key questions still remain to be answered: are these technology in a state that enable care and are we ready to fully benefit from such technology? How does mHealth technology contribute to the lives of individuals, groups, and communities as a whole? Is there a difference between developed and underserved communities, both in developed and developing countries in terms of technology design, their usage, and impact? What kinds of challenges and opportunities of mHealth in this rapidly changing setting need to be addressed? How can we design new mHealth technology and/or modify existing mHealth technology to better serve individuals, groups, and communities? This workshop will bring together researchers, practitioners, and developers from a variety of disciplines who are focusing their attention to design and develop cutting edge mobile-based mHealth technology, and/or investigating the efficacy of such technology in real-life situation. These technologies span both hardware and software, and are targeted to improve the well-being of individuals, groups, and communities. The outcome of this workshop will be a position paper identifying the primary challenges for research and development in mHealth technology and outlining ways to overcome these barriers.