Just to circle back to this, I purchased the QardioBase X Smart WiFi Scale (https://www.amazon.com/gp/product/B09XMWB8YH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1). This scale connects to my Qardio account via WiFi, and I can use my app or desktop to view the results and history, including graphs of multiple body measurements (muscle mass, bone weight, water %, etc.). I just step on it every morning and then depending on the display, I cheer or pout. The data goes to the Qardio app - It does not sync with the Fitbit app, like I had hoped. So I track my weight metrics in one app, and my exercise-related metrics in another. I haven't tried this scale with multiple users so I can't report back on that requirement.
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