The lawsuit, filed on Thursday by Clarkson Law Firm in San Francisco, alleges that Oura rings are unable to measure any of the physiological signals needed to assess sleep quality or determine sleep stages, and that they instead rely on AI-generated estimates that have “a coin flip’s chance of being correct,” according to the complaint.
https://techcrunch.com/2026/08/21/oura-faces-lawsuit-accusing-it-of-misleading-consumers-about-sleep-tracking-accuracy/
