Oura says its new Ring 5 is 40% smaller than the Ring 4, with better battery life and accuracy. In a video interview, Jason Russell, VP, Consumer Software Product, ŌURA, spoke to Nandagopal Rajan about the re-engineering behind it, the features that matter most to users, and what comes next.

You’ve said the Ring 5 is a big change from the Ring 4. What’s different?

Russell: Oura is beloved by our members for the insights it delivers about sleep, stress, heart health and metabolic health. We hear time and again that people love the form factor, the personalisation and the accuracy. We also hear that they want it to be smaller. That has been the big headline of the next innovation our members have been looking to us for. It’s comfortable and easy to wear every day, but can we make it smaller?

That’s a big challenge, because we’re packing a lot of technology into a product that’s already quite small. But we undertook it, and the ring is now 40% smaller.…