Zillow is expanding its “housing super app” to more markets after seeing how well it has been received.The company is also continuing to add functionality to the app for both the real estate sales and rentals markets, Zillow said in a presentation released Tuesday (Feb. 13) in conjunction with its quarterly earnings call.The app is designed to simplify a difficult transaction, Rich Barton, co-founder and CEO of Zillow, said during the call.“Everyone who has moved knows that the process is complicated, time ...