Welltory claims to be able to measure your stress and energy levels by measuring your heart rate variability via your phone’s camera. They have an IFTTT integration, but you have to be a pro user to use it.
I’ve been trying to measure my energy levels in different ways, and it would be great if this were a more objective way to do that. But I’m not excited about paying for another service.
Does anyone here have any experience with them?