It is updated to fill in custom HR zones. Although this display require 1 field display to work, would love to have this over half screen as cadence meter works..... Please fix
I added a gauge to my Heart rate and Zone data field, which you can get here.
If you use the data field full screen or upper half screen on a (semi-)round device, it shows heart rate gauge. On other layouts it shows the HR zone as a background color.
You can choose to show heart rate as bpm, %HRR or HR %Max.
You can set up to 5 heart rate zones and you can set them however you want them (same way to set up as in Garmin Connect).