Two additional technologies feature in the present imagining of mHealth. The first is cloud computing. Mobile apps frequently will store mHealth data in the cloud, and cloud services increasingly will provide the data analytics back end for processing those data. The second is wearables. Currently, fitness bands and exercise monitoring apps dominate this category. They will be joined by more sophisticated biosensors, some of which will be included in watch-like devices.14 Many phones are equipped with internal sensors, such as microphones, proximity sensors, accelerometers, ambient light sensors, barometers, and gyroscopes. Such phones are not only platforms but also, in a sense, wearables. In 2015, Apple will launch a new category of wearables called Watch that is equipped with several biosensors.15 Unlike most wearables, Watch is relatively autonomous and itself a platform that app developers will be able to build out.