If you’re thinking of buying a smart scale, you might not know exactly where to start. There are some familiar brands in the market—and some that are less well known—and a huge range of prices and claims. Should you go for a big name? Spend big or save? Which technology is the best? Here’s the bottom line: All you need to know is your own requirements and which scale will meet them. This guide will go through some common features and limitations of smart scales, to help you decide what’s important to you. We’ll also provide some buying options. How do smart scales work?A smart scale has a few …