Design and Comfort: A 40% Smaller Smart Ring
The Oura Ring 5 is a finger-worn health tracking wearable that builds on the Oura Ring 4 by shrinking its size, improving day‑to‑day comfort, and adding more advanced health insights while keeping the familiar app‑based experience. The headline change in this smart ring comparison is size: Oura Ring 5 is 40 percent smaller than Ring 4, measuring 6.09mm wide and 2.28mm thick versus 7.99mm by 2.88mm. According to Oura, this makes Ring 5 its smallest health wearable yet and helps it sit more like jewellery than chunky tech. The new model is also lighter, at 2–2.69g compared with the Ring 4’s 3.3–5.2g, which frequent wearers will notice most during sleep and workouts. If you found Ring 4 bulky, pinching adjacent fingers, or distracting at night, the form factor improvement alone could justify an Oura Ring 5 upgrade.
Durability and Everyday Wear: Built for Real Life
For many Ring 4 owners, durability has been a pain point, especially if you often knock your ring on desks, weights, or door frames. Ring 5 keeps the titanium construction but adds a vaporized coating that aims to improve scratch resistance for long‑term wear. It is rated IP68, with water resistance up to 100 metres, so it is designed for showers, swimming, and sweaty workouts without fuss. The slimmer profile also means less surface area to snag or slam into hard edges as you move through the day. While Ring 4 was already water‑resistant and tough enough for most users, Ring 5’s workout‑ready design and finish are better matched to people who wear their smart ring 24/7 and lead more active, hands‑on routines.
Health and Blood Pressure Tracking: What’s New
On the health side, Ring 5 refines what Ring 4 started rather than reinventing it. Both track sleep, readiness, and daily activity, but Ring 5 adds redesigned sensors with more efficient LEDs and 12 signal pathways intended to improve skin contact and consistency across fingers and skin tones. Oura says this delivers more accurate overnight HRV and better workout heart‑rate signal quality, which matters if you depend on the data to guide training or recovery. The standout addition is passive blood pressure tracking through Oura’s new Health Radar system, which monitors metrics like blood pressure and nighttime breathing patterns in the background. This means extra insight with less effort, fitting the idea of a ring that fades into the background until the data matters.
Software Experience and Battery Life
Beyond hardware, the Oura Ring 5 upgrade leans heavily on software. You still get familiar sleep and readiness scores, but now with live activity tracking in the app for runs and workouts, plus an AI health assistant and new insights for specific treatments. These changes are most valuable for power users who actively interpret trends and tweak training or lifestyle based on the numbers. Battery life is slightly longer, with Oura Ring 5 rated for six to nine days per charge compared with Ring 4’s five to eight days, which means fewer recharges and less chance of missing data. For casual health tracking wearable users who mainly glance at sleep scores and daily steps, these gains may feel incremental rather than transformative.
Should Ring 4 Owners Upgrade to Ring 5?
For existing Ring 4 owners, the Ring 4 vs Ring 5 decision comes down to comfort needs and how deeply you use the data. If you find Ring 4 bulky, uncomfortable during sleep, or intrusive in the gym, the 40 percent smaller design and lighter weight are compelling reasons to upgrade. If you often scratch or bump your ring, the enhanced coating and workout‑ready build will also appeal. Power users who rely on precise HRV, workout heart rate, and richer insights – including passive blood pressure tracking – will benefit most from Ring 5. On the other hand, if your Ring 4 feels fine, you are not bothered by its size, and you check the app only occasionally, the improvements may be too marginal to make an immediate Oura Ring 5 upgrade essential.
