How to show completed grocery list items
Checking off a grocery list item doesn't permanently remove it from the grocery list, rather it is hidden.
Tap More Button, then tap Show completed items to show the completed items. You can bring them back to the grocery list by unchecking them, or you can view their extra ingredient details by clicking on the right-hand side of the item.
Hide the completed items by tapping the More button, then tap Hide completed items.
On the web app, completed items are shown in a category called 'Got'em', located at the bottom of the list.