7 Minute Workout is is exactly what the name implies, offering 12 exercises you can do entirely at home.
AnyFit is is an app which provides customisable workouts for all levels. If your goal is to lose weight, build muscle or get fit, then AnyFit must be a great choice. Unlike the other fitness apps, it is completely free and the workouts can be adjusted to your level. In addition, a 3D trainer is implemented to make the user's progress smoother.
Weightroom Workout Tracker is the first step of being the workout tracker I always wanted.