The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Houston Association of Realtors:
The Houston Living App is a partnership between the City of Houston and Houston Association of REALTORS(r) to better help residents of Houston connect to the world around them. The app will allow people to find a variety of public services, such as bus routes, libraries, parks, police stations, as well as restaurants, events, local deals and more. People may also find out who your elected officials are and how to contact them. This app will serve to build a stronger sense of citizenship and community, even in the fourth largest city in the U.S.