I've been in a wheelchair since I was 15 and could never just step on a scale. Turns out a lot of people have the same problem.
I found a validated formula in academic literature that estimates weight using a few circumference measurements. So I built an app around it. It was on Google Play Brazil for a few years and got 200k+ installs.
Now I'm making it global and free for everyone. No sign up, no ads, works right in your browser. You can also install it as a PWA if you want.
