As long as I have iPhone apps and related website on the brain, I have to talk about another one called LoseIt!
This app/website is great tool for keeping track of your calories in v/s calories out. It helps do this by allowing you to keep tabs on all the foods and drinks you have throughout the day as well as logging any exercise sessions. There is also a great user community on the website forums, so anyone looking for a little support with your weight loss, nutrition and fitness needs would find a nice home there.
I have been using this app/website combo for just as long as I have been using the iMapMyFitness tools and have already lost about 30 pounds using them both.
I wont really do justice to LoseIt! by explaining everything here. Rather, if you are interested, you should go checkout the website and download the free app from the Apple Store yourself. If you are serious about changing your eating habits to last a lifetime, you cant go wrong with LoseIt!.
The website is: http://www.loseit.com/
Oh yeah, for you Apple haters out there, a Droid app is available as well! 😉