I’ll be upfront: I haven’t worn the Oura Ring 5. I’m writing this as someone seriously thinking about buying one, who has gone through everything Oura says about it and tried to work out whether it earns its price. Consider it the conversation I’d want to have before spending the money.
Imagine waking up and, before the coffee, your phone already knows how you slept, how recovered your body is, and how hard today should be. No screen glowing on your wrist, no band digging in. Just a ring.
That’s the pitch. Oura calls the Ring 5 the world’s smallest smart ring, 40 per cent smaller than before, at 6.09mm wide and 2.28mm thick, weighing from 2 grams depending on size. It’s titanium, waterproof to 100 metres, and rated IP68 for water and dust. The tagline is “Built to blend in,” and that’s the point. It’s meant to look like jewellery, so you’ll actually wear it every day.
What it’s quietly measuring
Tracking only works if you never take it off, so the sensors have to cover a lot. Red and infrared LEDs read blood oxygen, green and infrared LEDs track heart rate, heart rate variability and respiration, a digital sensor follows temperature trends, and an accelerometer tracks movement around the clock. Oura says that adds up to more than 50 health metrics.
Those numbers turn into a few scores that matter in daily life:
- Sleep. A nightly score, a breakdown of deep, REM and light sleep, and gentle bedtime reminders.
- Readiness. A daily read on how energised you are, built from temperature trends, heart rate, sleep and more.
- Stress and resilience. It shows what stresses you out, what helps you recover, and how well you bounce back over time.
- Heart health. Round the clock heart rate, a cardio capacity estimate based on VO2 Max, and blood pressure signals that show overnight trends.
Where it gets interesting for fitness
This is what caught my attention. The ring automatically detects more than 40 activities, from cycling to basketball to housework, so you get credit for movement you never thought to log. It also sets a personalised daily activity goal based on your recovery, and depending on your priorities that goal might focus on daily activity or calorie burning.
For anyone starting out, or restarting, that matters more than a leaderboard. It’s less “go harder” and more “here’s what your body can handle today.” On a heavy day it nudges you to rest, and on a good one it tells you to move. If you’ve ever quit a plan because you went too hard too early, you’ll see the appeal.
To be clear, a ring doesn’t do the work for you. It gives you feedback, and the habits are still yours.
Oura says its heart rate readings match ECG at 99 per cent, its sleep staging matches a clinical sleep lab at 95 per cent, and 90 per cent of new members say they feel healthier. Those are the company’s own figures, with the health survey based on its own member feedback, so I’d treat them as a promising starting point and not as proof. And Oura says plainly that it isn’t a medical device.
Independent reviewers are fair about the limits, and I’d rather know before buying. If you’re a serious athlete who wants live stats or the most detailed exercise data, a Garmin or Apple Watch still makes more sense. A ring also isn’t ideal for heavy weight training, and lower intensity sessions like Pilates or yoga may need to be logged manually. The ring does best as a sleep and recovery companion with simple, passive activity tracking. Oura Ring 5 review: The wellness wearable you may actually keep wearing
Practical details
- Price (Australia): From AUD 649 for Silver and Black, and AUD 799 for Gold, Deep Rose, Stealth and Brushed Silver.
- Membership: AUD 9.99 a month or AUD 109.99 a year. Retailer listings noted a free first month for new members. You need it to unlock the full experience, so budget for it on top of the ring.
- Finishes: Six: Silver, Black, Gold, Deep Rose, Stealth and Brushed Silver.
- Sizing: Sizes 6 to 13, and Oura recommends a sizing kit even if you’ve worn one before. Don’t skip this, because the sizing differs from ordinary rings.
- Battery: Up to 6 to 9 days per charge, depending on ring size and usage, with a full charge in about 80 minutes.
- Charging case: Sold separately, and it gives a full day of battery in 10 minutes.
- Works with: iPhone and Android, with support for more than 100 other apps.
- Where to buy: Oura’s website, JB Hi-Fi, Harvey Norman and Amazon.
So, would I buy it? If you want a drill sergeant, this isn’t it. If you want something that quietly shows how your sleep, stress and movement fit together, and you’re happy to pay a membership for that, it’s a compelling idea in a very small package.
