Oura dropped the six-minute walking test: the ring now estimates VO2 max from five GPS walks, runs or hikes. A new Cardio Effort score adds up how hard your heart worked each week and tells you when to rest, on Gen3 rings and newer.
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Released Guide updated
Oura dropped the six-minute walking test: the ring now estimates VO2 max from five GPS walks, runs or hikes. A new Cardio Effort score adds up how hard your heart worked each week and tells you when to rest, on Gen3 rings and newer.
Read the storyBoth numbers in this case are Oura's own. The 21% that does not agree falls on sleep staging, which is the part of the score people actually read.
Read the storyThe IPO filing ties an $84.4 million rise in warranty expense to the fault, and names none of the affected batches.
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What 12 reviewers said
More reviewsReviewers wore it all day without minding.
Reviewers resent paying a subscription.
Reviewers got good battery life out of it.
Comparison
Compare smart ringsCost over 3 years
$615
Device price plus the three years of subscription this product requires.
Weight
2–3g
Grams on your finger. Lower is lighter.
Battery life
9 days
How long it lasts on its own, away from a charger.
Oura Membership costs $5.99 a month. The full features need it. The ring keeps working without it. You just see three numbers a day. Over 3 years that is $216.
Sleep stages, HRV, body temperature and the long-term trends. Without it the app shows your three daily scores and stops there.
Oura Membership costs $5.99 a month. The full features need it. The ring keeps working without it. You just see three numbers a day. Over 3 years that is $216.
Sleep stages, HRV, body temperature and the long-term trends. Without it the app shows your three daily scores and stops there.
DeviceRequired subscription
Ring weights change with size. These are the officially quoted size.
Battery life can vary based on usage, settings and firmware version.
If not this one
Reviewers prefer its subscription terms.
Quick answers
All FAQsReviewers wore it all day without minding.
Reviewers resent paying a subscription.
Reviewers got good battery life out of it.
Scores published by other outlets, normalized and averaged. iDevice did not test these products for this score.
Reviewer breakdown
Liked itDidn’t
Reveal to on sale
The gap has ranged from 7 days (Oura Ring 5) to 20 days (Oura Ring Gen 3).
CURRENT MODELOura Ring 5
PREVIOUS MODELOura Ring 4
No new model is close and the price is near its low, so we'd buy now.
Oura Ring 5
No new model is close and the price is near its low, so we'd buy now.
Returns
Warranty
Covered
Not covered
Good to know
Here is what you get when you open it.
Oura Ring 5
Size-specific standard charger
USB-C cableFrom Oura. Checked Sep 22, 2026.
Frequently asked questions
Oura dropped the six-minute walking test: the ring now estimates VO2 max from five GPS walks, runs or hikes. A new Cardio Effort score adds up how hard your heart worked each week and tells you when to rest, on Gen3 rings and newer.
Both numbers in this case are Oura's own. The 21% that does not agree falls on sleep staging, which is the part of the score people actually read.
The IPO filing ties an $84.4 million rise in warranty expense to the fault, and names none of the affected batches.
A patent application published this week describes a migraine prediction score built from sleep, temperature and heart data the ring already collects.
The application describes electrodes passing a small current through your finger. Its own search report already cites earlier work on several claims.
A ring cannot read brain waves or eye movement, so every sleep stage it reports is inferred from something else. The suit accepts that Oura admits this in its technical materials. Its argument is that the advertising never did.
A WIPO filing puts four to six photodetectors across the ring's width. Oura names blood pressure and arterial stiffness in the claims.
Five wearable health stories dropped this week, from Oura putting a doctor in the app to Samsung predicting fainting before it happens. They're not five stories. They're one.
Oura connected its hormonal tracking to a licensed virtual contraception provider. Apple and Samsung have the sensors but not the clinical pipeline.
Oura Ring 5 detected a reviewer's cold one to two days early.
Oura Ring 5 infers blood pressure from artery stiffness in a 6 mm body. Apple Watch can't fit in your finger.
Oura's next ring will tell you when you're wearing it wrong before it records bad data. Most health wearables wait until after.
Oura Ring 5 is 40% smaller than older versions. Turns out the biggest health tracking problem was the ring itself.
Oura patented a ring that accepts snap-on sensor modules, so you don't wear the bulk until you need it.