I’ve just bought some of the scales you mention, after a recent Biobank assessment showed I had high body fat, and I want to address that. They were under £20 and are very easy to use. I’d to download an app that I have to have open when I weigh myself, but then all the information shows immediately, with a chart detailing how it’s different from previous days. It’s too early yet in my better diet, more exercise regime to see if it’s working, but fingers crossed!
The one thing that annoyed me was my “body age”. 69 and I’m only 67. I have had a very indulgent Christmas and New Year though!