A senior iOS product manager at Apple, John Herbold, has left the company to become a product VP at a company called HealthTeacher. According to the latter firm Herbold played a "key role" in developing and launching iCloud, and led efforts in developing and marketing iCloud's Photo Stream image sync technology. Prior to those efforts Herbold was a senior product manager on MobileMe, and was involved in the development of web and iOS apps as well as services.