This tool will help you track not only calories and key macronutrients (fat, protein carbs), but also well over 100 micronutrients.
Micronutrients are vital to development, disease prevention, and wellbeing.
This app is meant for a nutrition-focused person who wants to simply track all nutrients on a phone. The tool maintains your privacy - it does not put your information into the cloud, post to social media or link up with other apps to send your information out into the webisphere. It just tracks nutrients. Period.
The source for the food data is the USDA database, which contains nearly 9000 foods. You can also use the tool as a way to track protein, fat, carbs, sugar, and calories if you add your own foods.