While preparing a meal, open the recipe and untick the items you ran out of. This way your ingredient database stays up-to-date

Remember to also untick the “add to shopping list” tick. You also can easily untick them later from the main page.

You can also tick or untick items from the ingredients list page. This is a great way to see which meals you could prepare if you have lots of ingredients.

The food list page will show the percentage of ingredients you already own for any given food.