There is absolutely no useful instruction with Feelfit, and the fields and controls are terribly user unfriendly. Worse, the whole thing just FEELS sketch, unstable and buggy.
After signing up (dammit) I was faced with another form with no field labels, and when I came to what is apparently meant to be a date entry field and touched it, I received a grays screen with a white box at the bottom; no labels, no placeholder text, no indication of what was expected. It took me some effort to figure out that this WAS a date entry, but the controls appeared to be invisible, in the white box! Useless. Literally.
Since this was is Feelfit that came recommended by The manual with my scale I tried it, but I will be deleting it ASAP and hope that there is another app that will recognize my scale.