Few people are aware of this, but Body Impedance Analysis is very inaccurate? Consumer Reports found in 2016 that the best of body composition scale was still 21% off from the gold standard BodPod.
Before knowing that, I was relatively satisfied with the Omron body composition scale, which I’ve reviewed on Amazon. It doesn’t sync with anything, but I’m fine with opening up a spreadsheet once a week and logging one row of weight, body fat, muscle percentage, and visceral fat. On the plus side, it has a handle, which gets the current to pass through more of your body than scales without one.
Healthline has a review of body composition scales but their analyses are pretty superficial, naive, and almost identical in substance.
I gave up on using body composition scales and got into excellent shape in 2021 by eating up to 1700 calories a day and lifting weight 3x a week for 3-4 months. I used a regular scale.
Then in 2022 I got rid of the scale, because it kept showing the same weight, as I was undergoing body recomposition, eating up to 1800 calories a day.
TL;DR - you don’t need a scale.