STORY LAST UPDATED: Tuesday 9 July at 09:10.

We’ve all been on the fitness tracker train for a while, using them to supercharge our sleep, track our cycles and monitor our stress. But when I learned of the Oura Ring, ridding me of the bulky watch-style band that spoils my seamless summer tan, I was sold.

The wearable health monitor, the first model of which was launched all the way back in 2015, is designed to ‘paint a truly holistic picture of your health’ by monitoring your sleep, activity, stress, heart health, and hormonal cycle 24/7, before providing personalised insights and recommendations. The fact that it leans into the chunky jewellery trend, while also mimicking the classic wedding band? An added bonus, enjoyed by celebs including Kim Kardashian, Gwyneth Paltrow, Jennifer Aniston and Mark Zuckerberg.

Even better news: thanks to the return of the Amazon Prime Day sale, all Oura Ring 4 finishes are now 15% off for Amazon Prime members.

Everything you need to know about the Oura Ring 4:

Arguably, the Oura Ring is one of the most sophisticated wellbeing monitors to date, measuring more than 20 biometrics that all directly impact how you feel, including heart rate variability (HRV), blood oxygen levels and temperature.

For those concerned about accuracy, the finger actually provides the most accurate reading of your heart rate, blood oxygen levels and temperature. Plus, the brand’s ongoing testing has measured the device to have a 79% sleep tracking accuracy, compared to clinical polysomnography at 83%. Need a tad more convincing? It also reported a 98% heart rate variability accuracy when compared to ECG2. Wondering how exactly it measures those metrics, though? Through a quartet of monitors:

But because a load of numbers and percentages aren’t hugely helpful to those without a doctorate, it then shares its findings via the clear and concise Oura app in easy-to-digest graphics tables.

Oura Ring

This does mean you will need to sign up for an Oura Ring membership, but for just £5.99 a month or £69.99 a year, you’ll also get tailored recommendations on how to up your scores.

What are the differences between the Oura Ring Gen3 and the Oura Ring 4?

First, the design and material. While the previous model had a titanium exterior surrounding an epoxy interior, the new iteration is made from lightweight, durable titanium the entire way through. The latter also comes fitted with recessed sensors, aiding a more comfortable fit and improved tracking. Talking of, the accuracy of the Oura Ring 4 is powered by Smart Sensing that dynamically selects the optimal signal path.

In terms of battery life, designers claimed the Gen3 could last a whole seven days, while you now get up to eight days of uninterrupted tracking per charge with the 4.

How we test the Oura Ring 4:

It’s no secret that GLAMOUR editors often moonlight as testing guinea pigs. Over 12 weeks, various team members were asked to call into question the many claims made by the Oura Ring design team and consider the following:

• Ease of use — Was the app intuitive to use, and were your results easy to understand?
• Design — Did the ring feel big, bulky, heavy or get in the way? Any signs of wear and tear after 12 weeks?
• Waterproof — Any issues when worn in the bath, shower or while getting sweaty in the gym?
• Effectiveness — Did the personalised insights and recommendations make a difference to your health and/or wellbeing?

Oura Ring 4: The Verdict

We’re still very much in the honeymoon period of our health tracking — AKA Oura needs a few more weeks of data to properly notice any patterns. However, our team of testers have pulled together a list of perks so far.