Oura Ring sued over sleep accuracy claims
Plaintiffs demand $5 million in compensation.
Image by Oura Health
- Oura Health faces a class action lawsuit claiming the Oura Ring misleads buyers about sleep-tracking accuracy.
- The plaintiff says Oura advertised medical-like sleep-stage tracking without using the clinical equipment needed for that level of measurement.
- Oura denies the allegations, says it stands behind its science, and plans to defend its accuracy claims.
- The case highlights growing scrutiny of wellness devices as consumers rely on health data for daily decisions.
Key Takeaways by nexos.ai, reviewed by Cybernews staff.
Oura Health, a Finnish health technology company, was named in a class action lawsuit alleging that its popular product, the Oura Ring, doesn’t accurately track sleep.
The complaint was filed on August 20th of this year by Clarkson Law Firm and plaintiff, Madison Surber, who bought the Oura Ring around May 22nd, 2025.
The plaintiff purchased the Oura Ring 4 Gold for $513.68 to track her sleep and get accurate information about it.
The complaint said that the company sold $300 rings as “capable of seeing what only a hospital sleep lab can see, including the 4 different stages of sleep: Wake, Light NREM, Deep NREM, and REM.”
The document further revealed that “Oura did not just claim to measure a heartbeat or a temperature, but the exact stage of sleep the wearer is in – which in reality requires electrodes in the scalp and sensors on the eyes, as only a hospital or other clinical setting can do.”
The document claimed that the company doesn’t use such technology, but that doesn’t stop it from advertising its product, which can achieve 79% accuracy in its measurements and 95% accuracy in “Sleep Staging Accuracy” when compared to a clinical sleep lab.
The lawsuit now has 100 class members seeking compensation, which is more than $5 million.
Oura’s response
“We stand behind our science, research, and accuracy claims,” Oura’s spokesperson told Mashable.
The company stated that it disagrees with the allegations and will defend itself.
Regarding the sleep accuracy allegations, Oura said that it will continue providing people with clear information on what its Ring “measures, what it estimates, and how members should use that information.”
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The lawsuit divides users
“If this becomes a class action lawsuit, I won't be joining,” wrote one Redditor, stating that they were “never under the impression this was a medical-grade device, but a wellness device.”
While some users agreed that the company never advertised the ring as a medical device, the issue is that it was advertised for its high accuracy.
“It’s a gadget, like a toy. [...] Wild that people are suing [...] over a gadget not being as accurate as medical equipment,” added another user.
Posts from the ouraring
community on Reddit
Last year, Oura Health celebrated its 10-year anniversary, selling more than 5.5 million rings and was valued at $11 billion.
Oura has previously funded research, which reveals which smart ring out of 3 models, Oura Ring Gen3, Apple Watch Series 8, and Fitbit Sense 2, is the most accurate when it comes to sleep tracking.
The research used 3 different models on 35 participants to assess which device was most precise for measuring sleep compared with polysomnography (PSG), the gold-standard sleep assessment.
The “winner” in this study was the Oura Ring Gen3.
While many Redditors acknowledged that the Oura Ring isn’t a medical-grade device, it helped them develop better sleep, eating, and workout habits.
However, not all users experienced the same effects. Some people also expressed their concern over the anxiety and stress their device causes them due to the need to constantly check their progress, health stats, and reports.
