Smart rings have gained traction for their unobtrusive form, superior skin contact and proximity to blood vessels that ensure accurate measurements. The Oura Ring 4 can pass off for a regular ring or a wedding band on your finger. Oura’s choice of titanium makes the device lighter and comfortable to wear. The ring is available in a wide range of sizes, you can identify the exact size with Oura’s sizing kit. We like the Stealth and Brushed Silver colour options best, some of these variants come with a premium over the standard Silver and Black finishes. The sensors that keep tabs of heart rate, respiration rate and skin temperature are embedded under the inside of the ring.

Sleep, readiness and activity define the Oura experience. We like how the information is neatly stacked within three sections that include Today, Vitals and My Health. While many wellness apps just generate data, Oura’s visually pleasing app offers insights about your body status including a useful Readiness Score. Sleep tracking is Oura’s calling card, this is where the Oura 4 has an edge over most wearables. Oura can detect workouts and share the data via apps like Strava or your Apple Watch. Battery life is one of the key reasons why smart rings have gained traction, the battery performance during our tests matched Oura’s claim of 8 days.