Inside the red-topped scale is a Bluetooth LE radio, which pairs up with your iPad and feeds weight stats to the app. It's accurate to less than a gram, or can conversely handle up to 6kg loads.

Newly released on Kickstarter, the SITU is a food scale with a built-in Bluetooth chip that enables it to communicate with an iPad. When a food item, such as fruits, vegetables, or even chips ...