![Several J-Style Smart rings arranged in a display case at CES](https://cdn.vox-cdn.com/thumbor/RqXd8-4QwMWEFbm4eWwJtfyM3xE=/0x0:2040x1360/1310x873/cdn.vox-cdn.com/uploads/chorus_image/image/73048269/jstyle.0.jpg)
For the past few years, the Oura Ring has been the most recognizable smart ring on the market. After what I saw on the CES show floor, it’s about to get some real competition.
The smart ring is a promising form factor, but it’s tricky to get right. It’s more discreet and comfortable for sleep tracking than a smartwatch. The underside of your finger is also a better place to take heart rate and blood oxygen readings than your wrist. The downside is that it’s challenging to create a device that’s stylish given how small and flexible the components need to be. Plus, they tend to be pricey, with fewer features than a smartwatch.
There are all reasons why I was surprised to see several working prototypes and products at CES. I genuinely can’t…