I saw a couple of days ago something about a health app on a blog. It was very interesting to read about it!
Jeroen Bakker (owner of a company: Lab1111) created the app. The company analyzed more than 3000 nourishment products from different supermarkets, together with some nutritionists.
The app shows for example which potato chips is the healthiest in his kind. To use the app you only need to download it and scan the barcode (with your camera) of the product you did choose.
The assessment is indicated with grade tings based on kcal, salt, sugar, saturated fat, etc. You see the products in three color levels: green, yellow and red.
To see a picture of the app, press the link: http://img265.imageshack.us/img265/9375/boodschapp.jpg
If you want to download the app, name: Boodschapp ( it is for free!)