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I feel like my Oura is pretty accurate. The fact it's a ring makes it very comfortable for sleeping, no issues at all.

FWIW, my sleep doctor says Oura rings are not accurate at all, but anecdotally I don't agree with him.

I do find the Oura is terrible at tracking activity like exercising, it's just wildly wrong. But for sleep it seems very accurate.

Trying to divine exercise from accelerometer data is hard. My kid's fitbit counted 2 hours of knitting as about 15 thousand steps.

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