Greater Goods via Amazon offers the Weight Gurus Smartphone Tracking Digital Bathroom Scale in Black or Clear for $24.99. Coupon code "GURUS101" cuts it to $19.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $8.22.) That's $40 off and the lowest total price we could find. It features an 4.3" LCD and interfaces with the free Weight Gurus App for iOS and Android.