Ability to add fractional quantities for items which are used gradually.
Add a fractional component (dial, similar to expiration date?) to quantity -- ⅛, ¼, ⅓, ⅜, ½, ⅝, ⅔, ¾, ⅞. This would allow for keeping track of items used gradually -- flour, rice, dried beans, etc. For bulk items, it might be useful to add unit of measure as well -- pounds, cans, boxes, cups, grams, etc.
This might be easier to do as decimal points and that would be fine as well. (At least with me).