[tablespoon]

> What's the cheapest wearable or device that can probably tell you if you have apnea?

Years ago I was once concerned I might have had sleep apnea. I did see a doctor, who said I almost certainly didn't have it. I also bought a $40 pulse oximeter that could do logging, and taped it to my finger over a couple nights. I didn't see my oxygen level drop below 90% (or something, I can't remember), so I figured I didn't have it.

My understanding is oxygen level is one of the most important factors to track for sleep apnea. I am also super-skeptical of movement-based sleep tracking. Since my impression is it's typically half-assing with cheap sensors that aren't very suited to the task (on their own).

[crucialfelix]

Smart Watches often can track sleep and approximate blood oxygen levels.

Does anyone know how accurate Samsung or Apple Watch are?

[Levitz]

You might want to check this youtube channel:

https://www.youtube.com/@TheQuantifiedScientist

Reviews of health tracking devices, often comparing their performance with medical equipment.