1 – Nike+ Training Club
In addition to a library of 30 to 45-minute workouts that considers your goals and fitness levels, this app explains how to execute each exercise with tutorial videos and lets you share your accomplishments on social networks.
Available for Apple and Android 
 

2 – Argus: Calorie Counter & Activity Tracker for Heart Healthy Living
This application is an all-in-one activity tracker that monitors your sleep, heart rate, calories and more. It offers you challenges to overcome and the option of building your own workout plan, as well as the opportunity to add everything you eat by scanning the barcode on the label to track your calories.
Available for Apple and Android 
 

3 – Lose it! Weight Loss Program and Calorie Counter
In addition to tracking your food intake and fitness activities, it gives you the opportunity to plug in your height, weight, age and your goal weight in order to construct a recommended net calorie intake based on how many calories you consume and how many you burn.
Available for Apple and Android 
 

4 – MyFitnessPal Calorie Counter and Diet Tracker
Calorie Counter and Diet Tracker by MyFitnessPal features a database of more than 5 million foods to sort through, making it easier to track what you eat per day. To make sure you’re able to track everything in your diet, it also includes a step tracker and a barcode scanner.
Available for Apple and Android 

5 – Fitocracy
For the competitive ones, this app will definitely be your personal trainer. It lets you track workouts and encourages you to work toward real-life goals through a leveling system and in-game achievements
Available for Apple and Android 

6 – Runkeeper: GPS Running Tracker
This application uses GPS to map your runs, and tracks your speed and the distance run. It allows you to set goals, get audio distance and time updates during your run, as well as great music and the option of switching tracks within the app.
 Available for Apple and Android