I just spent hours trying to create an app that does nothing more than saving the weight you input to your Garmin Connect Health Stats. And it looks like such a simple thing is not possible. The access to your profile is extremely limited, and the control you have over FIT files generation on a watch also pretty much doesn't exist. I don't see any other option to save your weight. I am very disappointed by the API that Garmin provides. Why is such a basic thing not possible?