Oura Ring 4 Review

Design and comfort

The fourth generation Oura Ring is designed to look and feel like a premium piece of jewellery, not a chunky gadget. The sensors are inset into the body of the ring, removing the bumps that earlier versions had on the inside, which makes it noticeably more comfortable to wear all day and night. The titanium and ceramic finishes feel solid but lightweight, and the rounded profile means it slides under pockets, bags and gloves without snagging.

You choose your size using a fitting kit, then pick from various finishes that range from subtle silver and black through to more fashion-forward ceramic colours. It is still thicker than a plain band, but once you get used to the feel it quickly fades into the background in a way most smartwatches never quite manage.

Health and sleep tracking

Where the Oura Ring 4 really earns its keep is in its health and recovery data. Rather than just counting steps, it tracks over 30 biometrics and turns them into three easy scores: Sleep, Readiness and Activity. Those scores are backed by continuous measurements of heart rate, heart rate variability, breathing rate, skin temperature trends and movement, along with optional blood oxygen tracking at night.

The sleep tracking is particularly strong. You get a breakdown of light, deep and REM sleep, plus bedtime recommendations and context that explains why a particular night was good or bad. Over a few weeks you start to see clear patterns, for example how late-night screens, alcohol or heavy workouts affect your resting heart rate and recovery the next day.

The ring also includes stress and daytime readiness tools, flagging periods where your heart rate and temperature suggest you are under strain, run down or coming down with something. It will nudge you to ease off on hard training days and encourage you to push when your body looks well rested.

Activity tracking and limitations

The Oura Ring 4 can automatically recognise and log many activities and workouts, and its step counting is perfectly adequate for everyday use. However, this is not a full-on sports watch. There is no screen, no built-in GPS, and no integration with external chest straps or bike sensors. You can manually log workouts in the app, but if you want pace, route maps or live training metrics, you will still want a watch or phone for that.

Think of Oura as the always-on background sensor that keeps tabs on your overall health and recovery, rather than a replacement for a dedicated running or cycling device.

Battery life and water resistance

Battery life is one of the big advantages of a smart ring over a typical smartwatch. Oura quotes around five to eight days per charge for the Ring 4, and in normal use you can realistically expect close to a full week before it needs topping up. A quick 20 to 80 minute stint on the small charging dock is usually enough to get you back to 100 percent.

The ring is water resistant to 100 metres, so you can happily wear it in the shower, in the pool and in the sauna without having to remember to take it off first. That makes it much easier to genuinely wear it 24/7, which is essential if you want reliable trends.

App experience and subscription

All of the data the ring collects flows into the Oura app on your phone. The app is clean and approachable, with simple daily scores backed up by graphs and trends for when you want to dig deeper. You can connect it to other health platforms such as Apple Health and Strava, and there are guided sessions for breathing, meditation and sleep wind-down if you want a bit more hand holding.

The catch is the subscription. After the first month you need an ongoing membership to unlock the full insights and historical data. The ring is already a premium purchase, so you will want to factor the monthly fee into the long term cost. If you are happy with that, the software does make good use of the data it collects, but if you dislike subscriptions on principle you may prefer a different smart ring.

Who is the Oura Ring 4 for?

The Oura Ring 4 is best suited to people who care about long term health, recovery and sleep quality more than hardcore training metrics. If you want something discreet that you can wear with work clothes, formal events and gym kit without screaming gadget, it makes a lot of sense.

It is also a good match if you already own a high end mechanical watch or fashion watch and do not want to swap it for a chunky smartwatch just to get health data. Oura quietly fills in the gaps, leaving your wrist free for whatever you like.

Oura Ring 4 key specs

• Form factor: Smart health ring
• Materials: Titanium interior with optional ceramic exterior finishes
• Sensors: Optical heart rate and heart rate variability, blood oxygen, skin temperature, 3D accelerometer
• Metrics: Sleep stages, readiness score, activity, stress, heart health insights, temperature trends and more
• Battery life: Typically 5 to 8 days per charge
• Charging: Magnetic charging dock, around 20 to 80 minutes depending on starting level
• Water resistance: Up to 100 metres (showering, swimming and sauna friendly)
• Connectivity: Bluetooth Low Energy, iOS and Android apps
• Membership: Monthly subscription required for full insights after the trial period

Verdict

Oura Ring 4 is not the cheapest way to count steps, and it will not replace a serious sports watch for interval training. What it does offer is one of the most discreet and comfortable ways to keep an eye on your sleep, recovery and overall wellness, with enough battery life to wear it almost all the time. If you are prepared to pay both the upfront price and the ongoing subscription, it is an impressive piece of wearable tech that genuinely encourages healthier habits.