Get your rep on with iFitness ($1.99). Novices to gyms often feel awkward and insecure about trying out new machines and laying on the common stretching mat with other people. If you need a little help getting started or just a coach to help you through your regular routine, iFitness has just about everything one could need for a productive workout. You can choose from over 300 exercises, which are explained with pictures and some video and keep track of your progress. If you want to target one part of your body, you can pick exercises targeted exclusively for that area, time yourself, count your reps, and email yourself a workout summary. You can also keep track of your BMI, weight, and food on iFitness.