Launched in January, this user-friendly app has 36 exercises, 13 predesigned workouts, and a custom workout feature to help you design your own 7-minute workout. Choose the length of rest intervals, the number of times you want to run through a particular circuit, and tunes from your personal music library to further personalize your session. With audio and visual instruction, you’re sure to get in a good workout anywhere there’s a floor, wall, and chair.Cost: FreeAvailable in: iTunes App Store, Google PlayDeveloper: Wellness & Prevention, Inc.10-Minute Core Challenge>>>Looking for a rapid-fat loss solution? The 21-Day Shred, your blueprint to building a rock solid, shredded body is back and better than ever. Get the full plan on your iPhone and iPad devices or download your PDF copy.