Xari MuscleTrainer

While you listen to your music, this personal-trainer app tells you when to start workout, rest, or go to the next machine. So you do not need to look to your clock. You can set up how to train: the number of muscle groups, machines per group, series per machine, separate times for workout, break, and machine changes. That app supports individuals as well as training groups listening to a sound blaster with an iPod, iPhone or iPad.