Oura Faces Class Action Over 95% Sleep-Tracking Claims as Suit Says Accuracy Is Near 50%
Updated
Updated · Quartz · Aug 21
Oura Faces Class Action Over 95% Sleep-Tracking Claims as Suit Says Accuracy Is Near 50%
3 articles · Updated · Quartz · Aug 21
Summary
A proposed class action filed Thursday in California says Oura misled buyers by marketing its ring as 95% accurate at identifying sleep stages when its real accuracy is closer to 50%.
Madison Surber, who paid $513.68 for an Oura ring in 2025, argues finger-based readings from heart rate, temperature and movement cannot match clinical sleep staging that uses scalp and eye sensors.
Oura said it disputes the allegations and will defend the case, which seeks to halt allegedly deceptive promotion, potentially stop distribution, and win compensation for customers who paid a premium.
The suit lands as Oura prepares for an IPO: the company was valued at $11 billion, sold nearly 3 million rings for more than $1 billion in 2025, and expects paid memberships to top 5 million this quarter.
The case adds to broader scrutiny of consumer health wearables, whose data can shape users' routines and health decisions even as debate persists over whether such devices deliver clinical-grade accuracy.