Body fat scales provide a rough estimate of your body composition based on your weight and other factors. However, research suggests that smart scales may not be fully accurate at measuring body fat.
James M. Nonnemaker, Paul D. Mowery, James C. Hersey, Christian T. Nimsch, Matthew C. Farrelly, Peter Messeri, M. Lyndon Haviland Nicotine & Tobacco Research, Vol. 6 ...