iphone ap for recording proteiens/carbs?

I just got a new iphone and was wondering if anyone has a favorite "ap" for recording those proteins and carbs?

smartpeople.com has an iphone app that is great for tracking food.  The website also has a recipe calculator and a place to save your recipes so you can enter the portion in your food log easily.

Thanks! I will give it a try!

I like being able to record and identify all my proteins and carbs.  Can't rely on remembering anymore - getting too old!