Yunmai Bluetooth 4.0 Smart Scale

Says it works with iOS 7, but it also says it works with the iOS Health App, which didn’t become available until iOS 10.

Does it work with iOS 11, which 80+% of iOS devices use?

Per the vendor: All versions of iOS should be compatible with the scale, including iOS 11.

What are the “10 key body composition measurements” provided by this scale?

From Amazon, they say:

Yunmai precisely measures Weight, Body Fat, Muscle Rate, Water, Bone Mass, Visceral Fat, BMR,BMI, Protein, Body Age. Bio-impedance sensors give you precise results, every time.