Track3 by Coheso, Inc. (about Coheso) is a diabetes planner and carb counter application on iPhone that provides you with nutrition information of over 75,000 food items, including items from over 500 brands and over 250 restaurants and fast food places. Track3 can track your glucose levels, insulin intake, medications and daily diet. You can also log your exercise, and monitor how many calories you’ve burned.

Here are some screenshots of the application:

Diabetes iPhone application - Glucose Ranges chart

Glucose Entry Page:

Restaurant List:

Example Nutrition page: