Yes, I’ve also been looking for that without success. Some apps claim to measure HRV using a phone camera, but it seems to be mostly a scam. It looks like you have to go with either a chest strap, an ear pin, or a thumb sensor
Yes, I’ve also been looking for that without success. Some apps claim to measure HRV using a phone camera, but it seems to be mostly a scam. It looks like you have to go with either a chest strap, an ear pin, or a thumb sensor