If you have an iPhone 3GS, make sure you look into the Nike Plus app to track your runs, because it comes pre-packaged with your phone! Workouts can be open ended, based on time, distance, calories burned, or custom made. This app tracks your pace in addition to distance, and even has a verbal coach to keep you motivated as you rock out to your iPod. The service isn't without it's issues and you will need a chip to place in your shoe that can be picked up at a Nike or Apple store... but I think we'll cover that in a future episode! Review by Stephanie Chu.

Pioneered by the soviet military, a kettlebell is a lump of weight with a handle. They're cheap, take no storage space and can give you the body of a Spetznatz warrior! Kettlebell Workout isn't a perfect substitute for a certified trainer, but it includes videos of Coach Hacker designed to teach you the basic swings, presses and more. Watch the video, try the excercise, and if you have somebody willing to snap shots of you, try the form check feature built into the app. Review by Patrick Norton.

Keep interval time with UltraTimer. This app is great for boxers, wrestlers, and cross trainers, specifically Crossfit practitioners. Review by Mauricio Balvanera.

For the avid walker, EveryTrail gives you an easy way to track your walks according to distance, speed, elevation and much more. Add details like photos and commentary to create a story to share with your friends. You can also search maps by location to find fun places to walk or hike. Review by Annie Gaus.

Yes, you need exercise, but eating right will also help you shed the pounds. Enter the free app Lose it. Enter your weight, and your end goal weight and you're ready. You track your eating and exercise habits, and in turn, you find out how many calories you can eat to attain your goal. This app is meant to be a guide, and if you don't enter any statistics, you won't benefit. They even have a "motivators" section to email you reports, reminders to log in, etc. No excuses. Download Lose It! Review by Eileen Rivera.

iFitness is a very thorough and comprehensive app for tracking and logging your workouts. With gym routines in mind, iFitness isolates all of the muscle groups in the body and identifies the different types of workouts and machines you can use to workout those muscle groups. It allows you to input details of your workout repetitions in addition to tracking your measurements, weights, and body mass index. You can export your data and generate graphs/charts of your workouts. Although everything must be manually input, if you're serious about learning more about fitness as well as logging your work, iFitness is worth all 199 pennies. Review by David Prager.

CardioTrainer is a next-generation mobile fitness application that can be your virtual training partner for running, biking, hiking, skiing or just about any outdoor activity you can imagine. Also featuring Facebook integration to share your workout and keep you accountable! Review by Ron Richards.