GRINASYS CORP. has Run a 3K Walking-Jogging Plan App (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE (regularly 99-cents) for a limited time.

RUN 3k is a 4-week training program that will take you from being a rollie-pollie couch loafer to a mile-pounding machine in a month. Well ok, you won’t be ready for a marathon—but you’ll actually be able to run AND you’ll enjoy it!

RUN 3k will put you on a schedule of 3 trainings per week, for about 30 minutes each time. 1.5 hours per week of exercise is pretty manageable, even if you’re an extraordinarily busy person, and you’ll find that the convenience of the trainings will make you more excited about your exercise!

The program utilizes interval training, combining a mix of running, jogging, walking and resting, so you’ll develop a running body and improve your lung capacity quickly and comfortably. You’ll be amazed at the changes in your body and abilities after only 4 weeks!