An apparatus is provided including a sensor configured to measure weight of a food item, a first interface configured to receive an identification of the food item, and a processor. The processor is configured to calculate how much of the food item has been consumed based on the measured weight, and to calculate, via a second interface in communication with a server, how many calories of the food item have been consumed based on the measured weight and the identification of the item and cause display of how many calories of the food item have been consumed to a first user.