For those looking to get in shape and stay in shape, Fitbit is the app to download. Fitbit sets itself apart from the rest of the fitness apps on the market by acting as an all-day activity tracker. Not only does this app help you track your workouts, it also helps you track your sleep, meals and basic daily activity. This app is great for anyone training for a race, as it also tracks your pace, time and distance while running, hiking or jogging. Fitbit also comes with a built-in calendar so you don't have to worry about keeping track of your workouts on your own. The app lays everything out for you neatly. Plus, no more tediously counting calories on your own. You can actually use Fitbit to scan barcodes. Pr, you can use the calorie estimator which includes over 350,000 foods to help keep track of your intake.