Oura Ring Sleep Tracking

The Oura Ring tracks sleep, heart rate, and body temperature from a titanium band on my finger. After 3 months of wearing it, I trust its data more than any wrist-based tracker. It reads my pulse from my finger's artery, which apparently gives a cleaner signal. The sleep staging breakdown shows exactly how much deep sleep and REM I got. I've learned that coffee after 2 PM consistently cuts my deep sleep by about 30 minutes, data I wouldn't have noticed without the trend graphs. No screen, no notifications, no buzzing. It just collects data quietly, and I check the app when I want to. Battery lasts about 5 days. The charging cradle is the size of a thumb. I've forgotten I'm wearing it multiple times because it weighs basically nothing. The subscription is $6 a month for detailed insights, which annoys me since the ring already costs $300. But the readiness score that predicts whether I should work out hard or rest has been accurate enough that I follow it. More health tech should be this invisible, doing its job without demanding attention and handing you clear information when you ask.