If you a runner, Runkeeper is just for you. This app is not only free but also one of the most popular fitness tools online. It tracks how long, how fast and how much you’re hitting the streets through GPS, and allows your friends to send you messages while you run. You can also use Runkeeper to keep track of outdoor activities like skiing, swimming or mountain biking.
3. Livestrong.com - Calorie Tracker (a.k.a. MyPlate)
Livestrong’s Myplate calorie tracker is a calorie and exercise logging tool, available for $2.99. This mobile app gives you an estimated daily calorie intake that works to help you reach your diet, weight loss and meet your fitness goals. However, it will not advise you when to exercise or how to eat or anything more than how many calories you should net in a day.
4. Nike Training Club
Nike Training Club, whose slogan is “get your own personal trainer, anytime, anywhere,” is a big database filled with bodyweight exercise routines to help you move quickly. The app includes detailed instructions and audio guidance from top Nike trainers, with over 100 custom workouts for you to choose. You can even sync your own music to your workout and enjoy your favorite songs while perfecting your body.
Fitocracy is free and available on iPhone and Android. This application challenges you with missions to fulfill and turns your workouts into a game by gaining points when you burn calories. Besides, you can post your workout stats to twitter or facebook and share your progress so that your friends can motivate you.