I use Renpho. A cheap smart scale that has a ton of good reviews.
https://www.amazon.com/RENPHO-Blueto.../dp/B01N1UX8RW
I got a tape measure as well when I ordered it.
https://www.amazon.com/Measure-Push-...measure&sr=8-6
Wyze Scale is US $19.99. My guess is some people spend more than that on soda and snacks per day.