I was going to say, maybe a Tanita but the one I looked at only does 0.2 resolution.
You have different gravity in America?-
"**FITSCAN SERIES BY TANITA ARE MANUFACTURED EXCLUSIVELY FOR NORTH AND SOUTH AMERICA. FITSCAN SERIES IS IDENTIFIED BY THE (F) AT THE END OF THE MODEL NUMBERS, MODELS WITHOUT THE (F) ARE MANUFACTURED FOR DIFFERENT PARTS OF THE WORLD. THE FITSCAN SERIES OF TANITA BODY COMPOSITION MONITORS INCLUDE GRAVITATIONAL ALGORITHM CORRECTION FOR THE AMERICAS. MODELS FROM EUROPE OR ASIA DO NOT HAVE THE SAME ACCURACY AS THE FITSCAN SERIES FOR CONSUMERS USING THESE SCALES IN THE AMERICAS."
I have scales that tell me how fat I am but I only use them for a giggle every now and again.
the earth is not quite spherical, so it's not that nonsensical.
I'm not sure there are great differences in weight accuracy, but I bought (used, from eBay, discontinued model) an Omron HBF-516 body composition scale based off of a paper that evaluated accuracy of the body composition side of things.
that Seca is a five figure research grade unit fwiw. this outperformed.
paper itself for the curious engineer that you are