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
GPXSee - GPS log file viewer and analyzer with support for GPX, TCX, KML, FIT, IGC and NMEA files.
Lose it! - Snap a photo of your food to get nutritional facts
Google Fit - Effortlessly track any activity. As you walk, run, or cycle throughout the day, your phone or Android Wear watch automatically logs them with Google Fit. • Get instant insights. See real-time stats for your runs, walks, and rides.
Workouts by Muscle Booster - Workouts by Muscle Booster is an app that provides you the home as well as gym workout plans.
Zombies Run - Walk, jog or run anywhere in the world. Hear your mission and music through your headphones.