https://techcrunch.com/2022/04/27/ouras-new-ceo-discusses-the-future-of-the-smart-ring/

Tom Hale gestures as speaks, revealing an Apple Watch on one arm and an Oura Ring on the other. When I point out the combination, he takes a beat. “I think it varies based on the use case and why you come to Ring,” the executive answers. “One of my first questions of the company was, ‘how many of the Ring wearers have the Apple Watch?’ And the number was surprising high.”

Oura puts the figure at around 30% — or just under a third. It’s a surprising figure at first blush, running counter to the notion of the Oura Ring as solely a standalone activity tracker. That’s how I had initially contextualized the product, as something akin to a wrist-worn fitness device in a smaller, less intrusive form factor.