Best Apps for Fitness Gyms & Personal Trainer is My Best Studio software solutions.
It is a affordable with all comprehensive features available.
More at : http://www.mybeststudio.com
Two options I have really liked even better was mindbody.com and┬áhttp://www.fitsw.com/. Mindbody was very nice and professionally done – the only downside was that it’s pricey. FitSW seems more tailored for individual trainers / smaller gyms because its free – just not quite as polished as Mindbody. Both Fitsw and mindbody have excellent ways to track progress on your client’s fitness and they both do a great job at recording workouts and diets. They both are very helpful in helping me manage all my client’s info in one location.