A free program for Android, by Fitify Apps.

The core and back muscles are the main muscles that support the spine, and they need to be strong and toned to prevent back pain and other problems. This app includes exercises to help you achieve that. The exercises are easy to do, and they will help you tone and strengthen your core and back muscles. You will get a six-pack abs and a strong back in a few weeks.

How to Use This App:

Choose an exercise, and select your desired duration, rest intervals, and challenge yourself with your custom training. With this app, you will get your own custom workout that you can do at home or anywhere else. Choose the exercises that you want to do, and follow the instructions. You can choose to set the difficulty level of the app according to your level.

The exercises in the app are easy to do, and they will not take too much of your time.