Oura Ring 4

Titanium smart ring that, according to the manufacturer, tracks heart rate, HRV, respiratory rate, body temperature trends, overnight blood oxygen and movement; 5 to 8 days of battery life. Product information is taken from the official manufacturer page; configuration and availability can change.

• Worn on the finger day and night; sleep score, sleep stages and readiness appear in the Oura app in the morning.
• The manufacturer states it works with iOS and Android and integrates with more than 40 other apps.

Good to know

• According to the manufacturer, the ring and the Oura membership are linked; the membership costs €5.99 per month or €69.99 per year (first month free for new members).
• No display; determine your ring size first – the manufacturer notes the charger is size-specific.
• Heart rate and HRV readings from consumer wearables are not medical measurements.

How the values come about

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• Products received free of charge are labelled on the review.