Recommendations for (fairly) accurate sleep trackers?

[SleepyMcDonald]

I would like to pair my data from cpap with some sleep stage data. I am currently using Samsung Galaxy watch 4 and Whoop for sleep tracking but those are wildly inaccurate. I would like something a bit more accurate while not stupid expensive, probably 90%+ accuracy would suffice.

I have been personally looking at Muse S, though i didn't yet find reports of how accurate it really is. Also hopefully it's not too challenging to use with CPAP mask.

Any recommendations?

[gainerfull]

I think the best commercially available consumer sleep tracking is found on the Apple Watch Series 9. This sleep scientist compared it to a reference eeg and found it to be the most accurate:

https://www.youtube.com/watch?v=4igZ3DEhrk4

If you're looking for cost effective the Apple Watch SE 2022 was also great at a much lower price point. You'll see in the video where pretty much every conceivable sleep tracking device is ranked against each other.