According to the complaint filed in U.S. District Court for the Northern District of California, Bal was an early investor in Oura, as well as serving as the company’s “primary marketing arm” in its early years as a cash-strapped start-up.

Another thing worth noting is a lot of people complain about the rings getting scratched, and showing signs of wear pretty quickly. I wore both of these nonstop throughout the day (including while lifting weights) and noticed the silver Ultrahuman was more resilient than the gold Oura, which did get a bit scratched up.

A potential Oura Ring 5 may be a long way out, but I'm already hoping for these key features and improvements.

A few of the editors on the Women's Health team, including our fitness director, our health and wellness director, and our e-commerce editor, are huge fans of the Oura Ring 4 and