Smartphones are mobile devices that perform many of the functions of a computer, typically having a touchscreen interface, Internet access, and an operating system capable of running downloaded apps. It is neither possible to cover all research fields where smartphones are used nor to describe all possible applications where smart devices are used. This book wants to highlight a selection of restricted contributions in the emerging research fields where smartphones can be used for innovative approaches. Then, this book is meant for academic researchers, engineers and for others who want to find out more about smartphone emerging technologies and future applications.