Although all foods contain calories, according to the developer some foods actually burn as many calories during the digestion process as they contain. Therefore you should mark them as having zero calories in your calorie counter.

Without further ado, here they are in all their glory:
Asparagus, apple, beet, blueberries, broccoli, cranberry, cantaloupe, carrot, celery, chicory, cauliflower, cucumber, dandelion, endive, garden cress, garlic, grapefruit, green bean, honeydew, hot chili peppers, lemon, lime, lettuce, mango, onion, orange, papaya, peach, pineapple, pickle, radish, raspberries, spinach, strawberries, tomato, tangerine, turnip, watermelon, and zucchini.

Instructions:
Download CAB file to Windows Mobile device then tap on file in File Explorer to install. This can be done either from your PC or directly from your device.

Important:
This software requires the .NET Compact Framework 3.5 from Microsoft.