This app by @pulseapp_bsc is pretty good.
Just place your finger on your phone's camera to measure your heart rate.
It can monitor in real time, and my heart rate has improved a lot.
Download link: apps.apple.com/tw/app/pulseapp...… After subscribing to a yearly subscription, you'll receive a verification code to redeem one SBT token on the official website.
Link: pulseapp.tech The project may issue tokens later.
