Strong.app - Strenght training logger.

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.

Keep - Keep - Home Workout & Fitness Trainer, easy-to-use for you to Lose weight, gain muscle and keep fit. Live a healthier and more active life with the home workout trainer - no equipment app.

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.

Maintain - Private social app built for you and your friends

Runtastic - Runtastic offers a series of fitness apps that can be used to track your running, walking, hiking, and cycling, as well as many other fitness routines. Read more about Runtastic.