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.

The Whoop band and its app feel more purposefully designed for fitness. While I definitely prefer the Oura Ring as a sleep tracker, the Whoop app and user experience is deeper and more versatile, casting a wide net for all types of athletes and performers.

With an improved design and more features, the Oura Ring 4 has made its way onto my hand for good, but I'm not giving up my fitness tracker just yet

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