[REVISION HISTORY]

Smart ring market evolves: Oura expands and explores medical

Updated 5 times since CLSTR started tracking revisions of this situation.

What changed

2026-08-23 14:45 UTC → 2026-08-25 22:08 UTC · added ~~removed~~

The smart ring market continues to expand, with Oura extending its global reach and exploring advanced medical applications. In August 2026, the Oura Ring 5 officially launched in Mexico, available through retailers like Amazon MX and Mercado Libre with prices starting at 8,499 pesos. The device features a redesigned internal architecture and two high-power light emitters to ensure consistent readings across various skin tones. Technical evaluations of the Ring 5 highlight a performance trade-off: while it demonstrates “exceptional accuracy” in nighttime heart rate and heart rate variability—comparable to ECG chest straps—it has seen a decline in sleep stage tracking accuracy, specifically regarding REM sleep detection, compared to the previous generation. This places it behind competitors like Fitbit and Whoop in that specific metric. Following a suggestion from investor Bill Ackman, Oura is investigating whether the device could eventually detect or provide alerts for life-threatening events. Ackman noted that data from his daughter’s ring helped medical professionals pinpoint the timing of a brain hemorrhage, occurring many hours before she was found unconscious. CEO Tom Hale confirmed he has directed his team to explore if the ring could have predicted or detected such an event, though Oura maintains the ring is not a medical device intended to diagnose or prevent medical conditions. Concurrently, Oura is facing a class-action lawsuit in the Northern District of California. Filed by the Clarkson Law Firm, the suit alleges the company misled consumers regarding sleep-tracking accuracy. Plaintiffs claim the device cannot accurately measure sleep stages because it lacks the ability to monitor brain electrical activity, eye movements, or muscle tone, alleging that Oura’s AI models rely on “guesswork” rather than scientific measurement. ~~Oura has denied these allegations, stating its technology uses multiple physiological signals supported by peer-reviewed research.~~ One filing suggests accuracy levels may have a “coin flip’s chance of being correct.”

Versions

Only revisions since CLSTR began indexing content versions appear here. Select a version to see what changed compared to the one before it.