Samsung Watch, iPhone and my fitness pal

[JustALittleShabby]

Is there anyway I can set my iPhone up so that my steps and exercise all automatically transfers onto My Fitness Pal?
Have tried going through Apple Health etc but I just can't work it out!
I'm guessing probably not as they're different systems but I was hoping someone might have found a work around please!

If you add your exercise on MFP it overestimates calories burned, and also gives you those calories back to eat, so you end up going over target and not losing weight.
It was a common complaint on SM that people were adding exercise and not losing weight because they’d been given extra calories.
However, I’ve no actual idea how to link them, it just might be best not to iyswim.