Having explored the app further, want to add some more info:

It lets you put in a recipe, and do portions, all with the free version, along with custom foods.

I've been using it to look up foods I was used to having as part of my low carb lifestyle, like cottage cheese, and what I noticed is that the food comes up with a Keto Grade, from A to F, based on a suggested portion size. Like, their default info and letter grade for salsa is 2 tablespoons, while the portion size for Queso dip is 1/2 cup. Which reflects the real world

I also love the pie chart that at a glance tells you what the macro ratios are in this food.