Supplements Watch Data for Managing Chronic Health Conditions

I supplement my Apple Watch data with this manual HRV reading every morning to monitor my parasympathetic system that's affected by a chronic neurological health condition. I've taken my reading every morning for more than a year under consistent conditions, same finger on the camera at the same time every morning prior to any external stimulants like food, coffee or activity, and I find the reading to be an accurate predictor of how I'm going to feel and fare for the rest of the day (low parasympathetic frequency means my body is struggling.) I've also had times where my HRV reading is super low but I feel fine and I think pffft this thing is off, and then I come down with a virus three days later, proving again that the HRV app knows if I'm sick before I know I'm sick!! I've taken measurements with this app while simultaneously checking heart rate with both an oximeter and my Apple Watch, and HR has been accurate so maybe those reviewers who had accuracy issues had older phones. Even my doctors find this data fascinating, since the correlation to my neurological symptoms has proven time and again to be accurate. Another great tool to have in my health management toolbox!