Is this just for your immediate family or are you trying to keep track of a large group? If it's just for your family (esp all in one room) it's pretty easy. As PP said, each time you purchase something on the plan, your receipt will list the number of credits left. If you generally eat together, it's pretty easy. The only thing we sometimes check on are snacks--kids get them at different times, or we share, etc. But if you figure on one snack per person a day, it's pretty to easy to do. Have fun!