My better half found a website called myfitnesspal.com. You can enter the food you just ate and it will tell you the calories. Thousands of food items are in the data base, from Hershey bars to Kroger beeftenderloin. You set the max calories you want and you can see ifyou exceed them. It will also track your exercise calories burned. You get used to using it pretty quick. Now that I'm down to my target weight and seem to be stable I rarely use it. The pattern of proper food/exercise has been implanted. And my exercise is pretty mild most of the time unless I pig out for a few days.