A free app for Android, by DuritzHTC.

The Gym Trainer: Fitness & Bodybuilding application is a powerful tool to get fit. It contains an extensive library with information on a wide variety of topics related to fitness and bodybuilding.

It has an amazing UI that makes it easy to browse, navigate, and use. The application is designed to help you learn how to use it and also how to find what you need in the library.

It provides a lot of resources that can help you improve your fitness and bodybuilding:

If you want to improve your muscle mass and increase your strength, you should definitely check out the Gym Trainer: Fitness & Bodybuilding application.