Ive downloaded a dozen if not more workout tracking apps in the iTunes Store and as soon as I found this, Ive never looked back. I love the ability for customization, weight tracking, and how it shows previous weights used to allow you to continuously improve week after week. OH, and the PR recognition is another great plus!
Zombiedude101 about Gym Genius - Workout Tracker: Log Your Fitness, Exercise & Bodybuilding Routines, v1.1