I use FitDay as well and now I am stuck since I have entered so many custom foods.
FitDay has plenty of seriously weird stuff. Sometimes it is hard to find a normal raw vegetable among all the complicated preparations they list (with an odd skewing toward Puerto Rican recipes). And I was laughing the other day that the default size of sunflower seeds, hulled, was ONE CUP. I routinely use .06 cup and .02 cup for 1 Tablespoon and 1 teaspoon, respectively when they don't give a Tablespoon option.
FWIW, when I have to enter a custom food, it almost always comes from an entry at The Daily Plate, so they appear to have a lot more of the stuff I eat.
But like I said, I am stuck and I love it now since it has all my personal weird foods
I use it to track my weight and weight goal and occasionally to run my menus through to ensure enough of everything good and not too much of everything bad.