So I have to ask, does anyone have the complete list of apps this connects to?
I would not count on it connecting to any if you value your privacy. I bought one, downloaded the app. Won’t let you run it at all unless you grant it permission to access your phone & photos. If you read the FAQ it says even Norton raises a red flag about this app, but of course you can trust this no name Chinese company over Norton, a company with decades of computer security experience right? Hello?
Would not recommend this to anyone unless you intend to use it as a standalone weight only digital scale.
If you bought one of these and you’re not willing to give up your privacy (and that of anyone who’s info you have in your phone) you can still download openscale for Android. For privacy reasons the author doesn’t link to other apps (Google Fit, etc) but it has decent tracking and goals built in.