I tested the new Oura Ring 4 Ceramic and it’s fixed one small but key issue

Score: 9/10

We like:

• Ceramic finish is more scratch resistant
• Excellent health and wellness tracking
• Great sleep tracking
• Comfortable to wear 24/7

We don’t like:

• Monthly subscription cost
• Activity tracking could be better
• Charging case costs £99 extra

What is the Oura Ring 4 Ceramic?

The Oura Ring 4 Ceramic is the latest smart ring from Finnish company Oura and one of the most expensive finishes available, costing £499. It was announced in October 2025 and offers all the same features as the company’s standard Ring 4, which starts at £349. But rather than a metal finish, it is coated in zirconia ceramic to make it more scratch resistant.

There are four colour options, including Petal (a pinky purple,) Cloud (a creamy white,) Midnight (a blue black) and Tide (a light green.) Like the Ring 4, it has a multitude of sensors packed inside that offer continuous data tracking of everything from sleep and stress, to heart health and activity.

I’ve worn both the Ring 4 and Ring 4 Ceramic – the former for a year before the Ceramic model launched; the latter for the last three months. With the same functions, is the ceramic finish actually worth the extra £150?

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Like smartwatches and fitness trackers, we wear smart rings around the clock when testing. They only come off when they require charging, which has to be done anywhere between every four and seven days depending on the ring.

We test each smart ring against five metrics: design and how fashionable the ring is; health features and how each ring monitors various wellness factors; smartphone connectivity, including how easy the ring is to set up and how useful the accompanying app is; accuracy, which we determine by comparing each ring to sleep monitors, smartwatches and other smart rings and battery life, including how long each ring takes to charge; and how long it lasts between charges.

I wore the Oura Ring 4 Ceramic for three months, alongside the Luna Ring Gen 2 and the Ultrahuman Ring Air. I also wore an Apple Watch Series 11 and compared sleep data to the Eight Sleep Pod 4 mattress topper. Prior to the release of the Oura Ring 4 Ceramic, I wore the standard Oura Ring 4 for a year, as well as the Ring Gen3 before that. When it comes to smart rings, I know a thing or two about them.