The WS-40 Smart Kid Scale offers a new way to accurately monitor your baby's growth. This Wi Fi and Bluetooth enabled scale measures a baby's weight by 0.4 ounce increments so that you confidently know where your child stands. Readings automatically synchronize with the Withings Baby Companion iOS app which displays your child's growth charts and let you log your baby's bottles and breastfeeding. The app also helps you compare his weight with the typical weight of babies of the same gender and age. The Withings Smart Kid Scale converts from a baby to a toddler scale thanks to its removable baby cradle. You therefore use it to track your child's growth up to 55 pounds. The scale is easily setup from your iPhone, iPad or iPod touch using the Withings baby companion app. It allows tracking of multiple babies and toddlers (including twins) with automatic recognition.