The Oura fitness ring and the Stelo continuous glucose monitor (CGM) now connect. For the past month, I've been wearing the Oura Ring on a finger and the CGM on my arm. Together, they've given me a more complete picture of how sleep, stress, exercise and, of course, food affect blood sugar. I wrote about Stelo in January. What's new is that it now integrates with the Oura Ring, which I've recently started using for the first time.