How should I name an app (and also populate the info sections) which is about a big corporation without doing anything against rules? For example I thinking of doing an app about McDonald's Meals Nutritional Values so users can be informed and select accordingly. But if I named the app for example "McDonalds Meals Nutritional Values" I think it wouldn't pass the review. How should I proceed?
How should I name an app which is about a big corporation without doing anything against rules?
Very carefully.
You cannot use someone else's trademarks in your app at all, because they are not yours.
You could extend your app to have nutritional values for multiple such companies, so Subway, McDonald's, KFC etc., and call it the "Nutritional Meals" app, but you cannot say, "this is the McDonald's Meals Nutritional Values app".