A lawsuit has been filed against the well-known smart ring brand Oura, alleging the company used false advertising by deceiving users about the accuracy of its AI-generated sleep tracking. The suit, filed Thursday by Clarkson Law Firm in San Francisco, seeks class action status and a jury trial.

“Oura built an $11 billion company on that trust,” the lawsuit alleges. “To capitalize on consumers’ desire for a tracker that could actually track sleep and monitor their sleep cycles. Oura sold expensive tracking rings, priced at $300 and up, advertising exactly that: that Oura rings are capable of seeing what only a hospital sleep lab can see.”

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