J-Style is one of the many smart rings I stumbled upon on the show floor. | Photo by Victoria Song / The Verge 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... Continue reading…