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 The Grid Media, LLC:
Butterfly Radio is the easiest way to broadcast audio to a wide audience from your mobile device. It's like running an internet radio station right from your phone!By managing a station on Butterfly Radio, you can post a link to a funny website, a picture or an audio file with your thoughts. Invite friends to manage a station together and bring your most interesting, funny, insightful stories to the world.