Find an APP to find similar food (makeup and kcal content) as a substitute

Hey guys!

I just bought the Vegan Mealplan. And sometimes I want to replace some foods with others, in the mealplan I found the following sentence:

For example, if you know the rough macronutrient (carbs, proteins, and fats) ratio of a food, you can find a food of a similar makeup and calorie content as a substitute. There are many different free apps and online programs that can do this work for you.

Does any of you have any suggestions for an app? Or how to find one?

Thanks a lot!

Kind regards,