“Oh, I don’t even own a scale,” I used to say breezily, in the smugly dulcet tone of one of those people who claims to never gain weight. Then I had a kid and gained a bunch of weight. And just as tracking my jogging stats with RunKeeper became an extra push to lace up my sneakers more often, a high-tech superscale like Withings’ Smart Body Analyzer WS-50 seems like just the thing to keep me honest and on track to meet my weight loss goals. We’re nerds. We need to embrace it.