Finnish healthtech Oura has launched Ring 5, the world's smallest smart ring, 40% smaller than its predecessor backed by $1.5B+ in total funding and a

Oura, the smart ring maker, filed confidentially for an initial public offering after it reached an $11 billion valuation last year. | Oura, the smart ring maker, filed…

The ring is 40% smaller than its predecessor, and comes with more accurate sensing, enhanced battery life, and more.