Oura hit with lawsuit over allegedly misleading sleep-tracking claims
Oura is facing a proposed class-action lawsuit that accuses the company of overstating how accurately its smart rings can track sleep stages.
Oura, a sleep-tracking company, is facing a lawsuit alleging that its devices mislead customers about the accuracy of its sleep-stage tracking. Filed in August 2023, the proposed class-action lawsuit accuses Oura of making false claims about its 79% and 95% accuracy rates compared to gold-standard polysomnography and clinical sleep labs.
The complaint points to a 2025 Nature study where the Oura Ring correctly identified sleep stages 53.18% of the time, underestimating light sleep by 13.84 minutes, deep sleep by 5.98 minutes, and overestimating REM sleep by 31.56 minutes. The plaintiff, Madison Surber, claims she would not have purchased the Oura Ring 4 Gold if she had been aware of its limitations, leading to her paying $513.68 for the device. Oura denies the allegations and intends to defend against them.
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