Overview
- A proposed class-action was filed in U.S. District Court in California on Aug. 20–21 by Clarkson Law Firm on behalf of Madison Surber, who says she paid $513.68 for an Oura ring.
- The complaint alleges Oura cannot record brain waves or eye movements and instead uses photoplethysmography (PPG), skin temperature, and motion sensors plus machine-learning models to estimate sleep stages.
- Plaintiffs point to Oura marketing that cited 79% and later 95% sleep-staging agreement with clinical sleep labs and argue those claims are misleading because clinical polysomnography uses scalp and eye sensors the ring lacks.
- The suit asks the court for an injunction to stop the alleged false advertising and restitution for buyers, and Oura has issued a statement saying it disputes the allegations and will defend the case.
- The filing raises broader questions about the limits of consumer wearables after Oura’s reported multimillion-unit sales and more than $1 billion in revenue, and it could affect user trust and commercial scrutiny of sleep-tracking claims.