Calorie intake shows you the number of food calories you have eaten that day. All food contains calories. You can check the label of packaged foods to see how many calories are in a serving. Experts believe that to maintain weight the average male should have around 2,500 calories per day, and the average female around 2,000 per day. If you want to lose weight you need to burn more calories than the calories you take in. The app gives you guidance on what a healthy energy intake is for you, taking your energy expenditure and body characteristics into account.