This is according to a report from CNBC who claims that Apple has a team in place who are exploring the idea of creating a custom processor for health devices. The report is based on job listings from Apple’s Health Sensing hardware team, which according to the listing says, “We are looking for sensor ASIC architects to help develop ASICs for new sensors and sensing systems for future Apple products. We have openings for analog as well as digital ASIC architects.”
It is unclear as to what kind of information these chips would measure because as it stands, Apple’s chief health and fitness related device, the Apple Watch, comes with a bunch of sensors of its own already that does the job pretty well. It is possible that this could simply be Apple’s way of further customizing their products to their specifications, and relying less on outside help. Either way it might be too early too tell what’s going on, so take it with a grain of salt for now.