Review: Oura took our favorite smart ring and made it irresistible. For women especially, the Ring 5 is worth the splurge.

When she got engaged to President John F. Kennedy, Jackie Kennedy wore a unique engagement ring for her time that symbolized ...

Oura took its class-leading smart ring, made it 40 percent smaller and made the battery last longer.

I wore the Oura Ring 5 for a month, and it's an even bigger upgrade than expected ...