FoodViewer uses the OpenFoodFacts-database and api’s to retrieve and upload food product data. FoodViewer supports the personal accounts of OpenFoodFacts. The account is used for uploading data to your personal account on OpenFoodFacts. Any upload that an user performs is (optionally) accompanied by the the account name and a unique non-identifiable application identifier.
For more info look at the privacy policy of OpenFoodFacts.