usually called "pay by use".... tinder does that: you get free swipes. and fill in the top and bottom with relevant ads. You go premium...well then depends.

But I have to admit, a food matching app with this approach would be strange since the person I am truing to match is know to me and possibly living in the same place.

I would personally open a chatGPT session and tell what I have eaten today or this week and should suggest from the history when I need it.