A proposed class-action lawsuit in Northern California accuses Oura Inc. and Finnish parent Oura Health Oy of overstating the accuracy of the Oura Ring’s sleep-stage tracking. The complaint challenges the company’s claim of 95% accuracy compared with a clinical sleep lab, arguing that a ring cannot measure the brain activity, eye movements and muscle tone recorded by polysomnography.
The filing cites a study of 45 patients that found overall sleep-stage classification accuracy of 53.18% and says REM sleep was overestimated by an average of 31.56 minutes. Oura rejects the allegations, saying it stands behind its science and accuracy claims and that multiple studies have compared its staging favorably with polysomnography. The case seeks damages and corrective advertising, and includes claims under California’s false-advertising and unfair-competition laws.
https://thenextweb.com/news/oura-sleep-tracking-accuracy-class-action-lawsuit
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2026-08-23 09:06:12 UTC
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2026-08-23 09:06:12 UTCEvent JSON
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"content": "A proposed class-action lawsuit in Northern California accuses Oura Inc. and Finnish parent Oura Health Oy of overstating the accuracy of the Oura Ring’s sleep-stage tracking. The complaint challenges the company’s claim of 95% accuracy compared with a clinical sleep lab, arguing that a ring cannot measure the brain activity, eye movements and muscle tone recorded by polysomnography.\n\nThe filing cites a study of 45 patients that found overall sleep-stage classification accuracy of 53.18% and says REM sleep was overestimated by an average of 31.56 minutes. Oura rejects the allegations, saying it stands behind its science and accuracy claims and that multiple studies have compared its staging favorably with polysomnography. The case seeks damages and corrective advertising, and includes claims under California’s false-advertising and unfair-competition laws.\n\nhttps://thenextweb.com/news/oura-sleep-tracking-accuracy-class-action-lawsuit",
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