Fig. 4.

Resulting app interfaces for the Apple platform based on user feedback includes the following functionalities for self-tracking meals: ( A ) carbohydrate counting assistance with textbox search function to access restaurant, grocery Nutritionix databases, and the United States Department of Agriculture food nutrition database, and an internal database of common alcoholic beverages; ( B ) blood glucose readings that sync from a HealthKit connected meter, meal component breakdown, and meal documentation with a photo; ( C ) compensation techniques employed for meals, alcohol, and exercise events; ( D ) favorite foods list defined by the user; and ( E ) barcode scanning to access grocery food data. The interface ( F ) for tracking exercise duration, intensity and start time was relatively unchanged.