We're all about affordable fitness here. That's why we led you to Jackie at "Love and Blueberries" for her five inexpensive fitness finds. Now, we're heading you to Kristen at "CafeMom" for a little lesson on using your iPhone to whip that bod into shape.

OK, so iPhones aren't exactly a low-budge item, but the applications are, and even if you don't have the phone, you can use the same tools online. If you're sweet on daily calorie counters, food information databases and calories burned calculators, go see Kristen for the skinny on cheap stuff.