FitnessBuilderFree first month, then $9.99 per month. FitnessBuilder puts personalization first by carefully tracking users' strength and cardiovascular fitness, weight, and other body stats (including BMI and BMR). Users can also post workouts and progress graphs to Facebook and Twitter, and schedule workouts in advance to stay organized and accountable.With nearly 800 workouts, 5,000-plus exercises, and access to a live personal trainer, consider this app a complete fitness experience.