LifeSum is described as 'Set a weight goal and we'll tell you how to reach it! Track what you eat and your exercises on the web or using your smartphone' and is a Calorie Tracker in the sport & health category. There are more than 100 alternatives to LifeSum for a variety of platforms, including iPhone, Android, iPad, Web-based and Android Tablet apps. The best LifeSum alternative is FoodYou, which is both free and Open Source. Other great apps like LifeSum are OpenNutriTracker, Whey to Go, MyFitnessPal and Alma Nutrition.