Some suggestions
Please add a muscle heat map, and the ability to select which muscle group on that map is trained in each workout Also by having an active workout, the ability to select how many days have passed since each muscle group was trained on the muscle heat map Add the ability so that a trainer can assign workouts to people (this can be premium) A black theme would be great Some timers that tell you when you how much time you should spend on each session and timers for how much you need to rest on each session (this can be premium also)