Also known as the
Withings scale.
The apps are free, but you have to spend $150 on the scale.
It seems "bathroom scale" accurate. Don't use it to weigh your blow.
Ironically, it's super sensitive too. Too often it won't settle on a weight after about 30 seconds and the thing just gives up.
The glass (or glass like) surface is a magnet for any grot on your feet; you have to use it barefoot, or the blubber sensor won't work.
All that said, setup is easy, and if you want to
track your blubber, it's excellent. After setup, there's no effort involved other than stop shoving those chips and pizza in your face.
It tracks blubber blubber too, Not just lean blubber. The blubber blubber comes with an objective. Figure out yourself why I didn't show that. My sliver of integrity however, demands I note that spike at the end is probably due to clothed vs. nekkid.
It's capable of tracking multiple people. I have no idea if it can tell the difference between people with similar weight/blubber content. I'd guess not.
If you have the cash to spare, and are interested in what it does, I recommend it.