biohacking devices 7

https://violetmetric.com/s/K2v2uUuoPmM4TeioFstEJ

I've been tracking my sleep and stress levels with a small wearable that monitors heart rate variability and skin temperature. It's nowhere near as invasive as the implantable sensors some early adopters are trying, but it already helps me adjust my routine when my body's fighting off a cold before I even feel symptoms.