Comment by tdicola

Just use a Google Sheets or other online doc and a normal scale. It's so much faster in my experience to use a normal scale, read the number, then pop open the sheet (it can be a direct link on your homescreen) and type in the weight on a new line vs. fumbling with bluetooth connections, horrible apps, etc. Your data is never locked in to a service and you can graph, chart, analyze, etc. as much as you want too.