Hello
I have the garmin fenix 5x plus and when i buy it he has one application already installed that can measure and show your heart rate and pulse.
Sadly by mistake i delete this app and i was searching to install it again but i could find it!!!
I know that are a lot simular but i would like to find the original one. I think its a Garmin app
See and the photo below
Thank for your time ciq.forums.garmin.com/.../1474310.jpg