Oura Ring 5 is 40% smaller than its predecessor – but tracks over 50 health metrics

The world’s smallest smart ring tracks sleep, heart health and activity, all in a lightweight titanium design. (Picture: Metro/Oura)

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Wearable health trackers are advancing every day. From Fitbits to Garmins, the technology seems to be getting smaller and smaller and the features more sophisticated. 

But none can compare to the brand new

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