Don't have some time going to gyms? It would be better if your doing it in you're homes.
Just download Home Workout from google play. This would be great for someone that doesn't have time going to gyms.
It's an all in one app. It do have a full body workout as well as abs, arm, legs, etc. It also have for beginners to advance type of workout.
Benefits would be, less time. No money to be paid for the gym. hassle free. you also controls your time of exercising.