I wore the Oura Ring 5 for 24 hours - and it fixes my biggest issue with Ring 4

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ZDNET's key takeaways

• I wore the Oura Ring 5 for a day.
• It's more comfortable and smaller on my finger.
• Sometimes the best upgrades are the ones you can't see.

When you got a chunky smart ring around your finger, size matters. Oura unveiled its super-slim Oura Ring 5 in late May, and it's visibly smaller and lighter than the Oura Ring 4 the smart ring company unveiled two years ago.

Also: Oura Ring 5 vs. Oura Ring 4: I compared the smart rings for health tracking - and it's very close

The Oura Ring 5 not only arrives with a 40% smaller, thinner design. Oura also adds one extra day of battery to the ring for maximum wear. To accomplish this, Oura had to redesign its smart ring completely, changing the battery, refining the algorithm, and inserting more powerful...

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