Thats what this app is for. A friend told me about this when I was doing much more "painful" workouts and now I have more fun, spend less time in the gym and get better results based off the tailored workouts I choose using JEFIT.
I love the timers and notes section and how it lets you know what you need to lift to set a new PR.
CGsus about JEFIT Workout Planner Gym Log, v9.82