I wouldn't worry about it being similar. Put a twist on it - make it generate fake versions of the terribly boring magazines that lie around bathrooms forever. Or something similar - it'll still be interesting.
Take it as a very good sign that you're not the only app trying to do this! That means there is a market & customer demand for the product you have under development. Move fast and make things!
I am coding a very similar app, right this second.
I'm going to stop and have a scotch.