Healthy Buddy calculates the calories of the food you eat daily and keeps the record of the calories.It can tell you the calories in the food you are going to eat plus the calories you have already consumed till that time in a day.You can just say "i have eaten pizza" or "I ate pizza with beer" and it will tell you the calories in it and keeps that record with itself.You can also ask "Tell me my calories" to get know about the calories you have consumed.