Hi, it would be really beneficial to add FFMI to the weight graphs in the app. You have all the data needed to add this, so it shouldn't be a hard task.
FFMI is way superior metric to evaluate body composition, compared to BMI, especially for active individuals. So this would be a great add in my opinion.
This way we can easily follow our progress in the gym, and hopefully get some data where we can compare ourselves with other users so we can see in what percentile we currently is in (similar with how we can see our VO2 max compared with other users). This way we can set realistic fitness goals with the help of our Garmin units.
Kind regards,
Christian.