We know that Apple is bringing new fitness tracking technology to iOS 8, but how will your phone know whats going on with your body? While it has been anticipated that Apple would collect fitness information through a smart watch or wrist band of some kind, rumors are circulating that Apple could go the way of smart earbuds. Apple analysts have thrown around the idea in the past, but the technology never had a purpose before. With HealthBook, there would be a reason to develop elaborate earbud technology.