Can we get goals which can be specified by fat percentage? Its often a much more reasonable thing to aim for than weight or BMI as it is invariant to lean mass & hydration.
I agree it’s probably a better thing to aim for, but I’m not sure about the mathematics. To achieve a lower body fat percentage you could either lower your body fat weight or increase your lean mass weight. Or a combination of both. This makes the prediction calculations a little trickier.
If you are viewing Trends by body fat weight (instead of total weight), FatWatch calculates your lean mass as of today, assumes it will stay constant, and figures calorie numbers based on how much body fat you have to lose.
I’ve never felt totally OK with how it works, since according to my bathroom scale my lean mass varies quite a bit from day to day. This is mostly measurement error, but the scale is all that FatWatch has to go on.
I suppose I could implement a body fat percentage goal with the same assumptions: all predictions are made assuming your lean mass will stay the same, and if the numbers vary a lot, so be it.
I guess my point is, adding a body fat percentage goal would mean big changes to how the Trends tab would work, and I haven’t figured out what that means yet. Your input is appreciated!
