Rheostat: HRV & Recovery

Rheostat gives you one number each morning: how recovered you are, measured against your own baseline, never against population averages. It's free, every feature is included, and it runs on the Apple Watch you already own. WORKS WITH THE WATCH YOU HAVE Rheostat needs an iPhone on iOS 16 or later and an Apple Watch worn overnight: Series 4 or later, any SE, any Ultra. No new hardware, no particular model. If your watch records sleep and heart rate variability, that's everything the score is built from. READINESS (0 to 100) Your overnight heart rate variability, sleep, and resting heart rate, compared to your personal normal from the last 60 days. High means you can push. Low means ease off. Each metric can be tapped for a plain explanation of what it means and what moved it today. STRAIN (0 to 10) How much cardiovascular load you actually accumulated, read straight from your heart rate…