This explains how the HRV4 app & Dropbox folders work & troubleshoots issues. I know it is an old post but nothing has changed that I am aware of.
You will need to go into Intervals setting page, set up your Dropbox folders & then cancel the HRV bit within the Gamrin setup as that writes to the field that HRV4 app will be using.
Then your Welnness field should contain the HRV4 rMSSD & not the Garmin HRV score.
