Simply put, I'm developing a 'social' app centered around similar interests in brands (specifically restaurants). The main function of the app has users add restaurants to a 'shareable favorites list' of sorts. I intend on generating profit through ads or possibly otherwise in the future
If I intend on generating profit from ad revenue, am I allowed to reference said brands/franchises? Does the answer change if I use a trademarked logo? If not, does it change if all entries of restuarants and logos are added to the database by users and not the app owner(s)?
Ex. If my app's feature allows users to access entries for McDonald's, Burger King, and Wendy's (which have respective locations and trademarked logos attached to them), will I get sued for making a profit off of that feature the app?