Lose It! is a fantastic free health and fitness app that lets you track your calories through food and exercise to meet your weight loss goals. In addition to a wide array of exercise and food calorie counts contained in the app for you to choose from, you can also scan food barcodes to get all the nutritional information and add it to your daily food intake. Lose It! integrates with Nike FuelBand, Fitbit activity trackers, and Jawbone UP and has a $39.99/year premium account that provides more robust health and fitness tracking (including body measurements, email reports, and more).