Ive been using this for several years. Its a great app my only pet peeve is that if you want to use multiple devices, you have to backup after each workout and then restore on the other device.
I wish that they would include a randomizing function for your workout routines so that if you have a routine saved with multiple exercises for a specific muscle group it would suggest exercises for you.
Sioduil about GymGoal Pro, v8.1.3