HardFox FitnessPack, which you can get on the Windows Phone platform, not only will make your muscles stronger but also improve their sculpture. Fitness version of "Aerobic Weider Six" was an inspiration for the 42 days training program and it's an excellent training to develop a "6 pack". You can fully control both the performed exercises and training calendar by means of our application. Each exercise has its own animation and voice instructions in this application. Good luck!