If you're obsessive about food (and who isn't?) whether it be for health, fitness, or just OCD reasons you can now look up information on over 7,500 food items from the grocery store or fast food restaurant with a little application by Obsessive Code called Food IQ. One of its best features is that it's completely local and doesn't require an Internet connection.
In addition to calories and fat, it displays information on carbs, sodium and many other vitamins and minerals (see the screen shot). Obsessive Code will update the application freely as new information is released by the U.S. Department of Agriculture. They are also planning to add a daily nutrition tracker with the next update.
Food IQ isn't on their Web site yet, but it's available for
free US$0.99 in the iTunes App Store.