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
CalorieTracker.io - An intelligent calorie and weight tracking assistant that learns with you.
Lose it! - Snap a photo of your food to get nutritional facts
MyFitnessPal - Track the number of calories that you consume each day with MyFitnessPal. The app also lets you create a diet and track the exercise that you complete each day whether it's walking, running or some other type of program.
Workouts by Muscle Booster - Workouts by Muscle Booster is an app that provides you the home as well as gym workout plans.
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.