In Grosh, you can assign a category to an item on your list. This will group the items on your list, and this is good as items in the same category is normally located close to each other in the store. Based on past purchases in a store, Grosh will sort the categories such that you will see the list ordered according to how most people shop items in the store – clever!
Grosh comes pre-populated with 20 categories, but you may add your own. If many users add the same category, it will be added to the global list of categories for the language. If you think the list of categories has a category you will never need, then you may hide it by going to Settings – Categories and swipe the category in question.