I think they can give you a first idea of what you should be searching for, if you find a specimen you have no name for. From there on you'll have to figure out

I think they can give you a first idea of what you should be searching for, if you find a specimen you have no name for. From there on you'll have to figure out what is similar, edible, and grows in your area; and in particular, how the edible ones are different from inedible/poisonous ones. It is usually just a few. I can't fathom eating some wild fungi without doing this kind of due diligence, blindly trusting an app.