Fitbit has everything I need, the steps, the Heart Rate, it has all of my exercising modes, and it has a fair price. It has a rather simplistic User interface, which I really like to be honest. Highly recommened!
Strava - The #1 app for runners and cyclists
Workouts by Muscle Booster - Workouts by Muscle Booster is an app that provides you the home as well as gym workout plans.
Lose it! - Snap a photo of your food to get nutritional facts
Tband - Tband is one of the best mobile apps introduced by Shenzhen Mi Dun Technology Co.
FlagFit - FlagFit app is an exercise tracking app through which you can track your daily workout to share data with your doctor or with the trainer to get experts’ advice.
Fitness Coach: Home Workout - Fitness Coach: Home Workout is an interesting app that offers you customized workout programs that are easily integrated with your hectic routines.