This is a relatively new application for the i phone and blackberry.
This tool is essentially a diet coach on the go. You input your food, exercise routine and other factors, and it tells you everything you need to know to keep you on the right track.
There are many tools within this system to help you
1. Calorie Counter
2. Online community
3. Keeping the food diary actually shows you what you are eating and encourages you to cut out foods that are not needed.
Free Version- FREE, limited capabilities
Pro Version- $3/month, more features
Maximum Version- $ 5/month, full features
Want to learn more? Click here