MyFitnessPal helps you stick to your health goals by tracking the calories in the food you eat and the calories you burn during exercise. The homepage gives you an overview of how many calories you've consumed and burned, based on what you've recorded in your Food Diary. It also shows a feed of recent updates from your friends in the app.
When you finish your diary for the day, MyFitnessPal tells you how much you'll weigh in several weeks if you maintain the same eating and exercise habits. It also offers advice if you're not getting enough calories, or are eating too much to meet your weight goals.