I'm a bit skeptical about wearables that measure anything beyond heart rate. Has anyone found consistent reliable data from any other sensors that acting upon proved to be a boon?
Oura showed that I had breathing disturbances when I slept, which made me try an at home sleep test, which showed me I had moderate sleep apnea. Treating that has dramatically helped me sleep quality, completely changing how I experience every single morning. I didn't expect to find something that helpful, but it was really clear from the data on the oura that I wasn't sleeping soundly, so I kept digging.
Blood Oxygen for old people who have lung problems. Let's you know if you need the tank.
Wouldn't the sleep stage algorithm use the accelerometer data? Counting steps is useful.