Rockley Photonics is working on this: https://investors.rockleyphotonics.com/news/news-details/2022/Rockley-Photonics-and-Medtronic-Collaborate-to-Deliver-the-

Rockley Photonics is working on this: https://investors.rockleyphotonics.com/news/news-details/2022/Rockley-Photonics-and-Medtronic-Collaborate-to-Deliver-the-Next-Generation-of-Wearable-Healthcare-Monitoring-Devices/default.aspx https://investors.rockleyphotonics.com/news/news-details/202... There was a press release last year because they're an Apple partner. I have high hopes but I keep remembering that Theranos had a lot of promise too.