I would like a feature to automatically add something every day. Currently I drink a liter of coffee every day, regardless of if that's healthy or not, it is tedious enough I don't bother to enter it.
I've gone through diets trying to eat 2 apples every day, 3 protein shakes a day, etc. Logging food is tedious so anything to make it easier would be a big help.
Auto-add foods should be editable at least the day after - I may plan on eating 2 apples a day, but the store could be sold out and I ate pear instead. Whether they are editable the day of, and when they show up, doesn't matter, so whatever is easier to implement.