A free app for Android, by AAA Fun.

See what it’s like to run your own gym! In this game, you can create your own fitness club with all the equipment and a training program for your clients. You can make it public or private, it is up to you.

Here, you will encounter various types of clients including novice athletes, experienced fitness instructors, gym newbies, or someone who just wants to have fun. Each one requires a different approach, and that’s something that you need to figure out. You will have to offer a training program for your clients. You will also have to help them do the exercises correctly.