Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications.
Freeletics - Freeletics Bodyweight is the most effective fitness training program, adapted to your schedule...
fitbit - The Fitbit mobile app is for people who use Fitbit fitness trackers to keep track of their activity goals, food plans, and other fitness related things. Read more about fitbit.
JEFIT - Jefit is the #1 popular gym workout app for Android and iOS. Jefit allows you to manage your training routine and keep track of your workout progress easily.
Strava - The #1 app for runners and cyclists
Fitbod - Personalized Strength-Training powered by Machine Learning