Hey y'all! I've been using Visible for a while now, and I've noticed an issue I'm wondering if other people encounter.
Sometimes, when my heart rate jumps abruptly (like if I stand up) my heart rate as measured on the app will instead drop, usually to 60. It's visible on the graph over time, too, where I'll have sudden dips in heart rate, according to the graph, that are actually sharp rises in heart rate that it's registering wrong. Sometimes even if it isn't a sharp rise in heart rate, just a high heart rate, it won't register it correctly. Like, I took my blood pressure and the blood pressure cuff said my heart rate was 157 bpm at the same time the visible app was saying it was 62 bpm.
I also have trouble with pulse oximeters sometimes, and I can't tell if this is a like "Visible has trouble with this in general" issue or a "my specific combo of health issues confuses optical heart rate sensors" issue