Nutridata covers more than just nutrition.
The EU 1169/2011 regulations require that the ingredients are posted on your product in quantiative order (The so-called Quantitative Ingredient Declaration). This information is dependent upon your recipe and Nutridata is designed to deal with this automatically.
When you prepare your recipe, Nutridata calculates and re-orders the constituent ingredients into weight order and assigns a percentage for you. There is no effort on your part and the exported data comes in that sequence for use with your labelling software.