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!
Mi Fit - Mi Fit is a band to monitor your health and fitness level on daily basis.
Strava - The #1 app for runners and cyclists
Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications.
Lose it! - Snap a photo of your food to get nutritional facts
WHOOP Strap - The world's most powerful training and recovery tool
Workouts by Muscle Booster - Workouts by Muscle Booster is an app that provides you the home as well as gym workout plans.