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 Viatcheslav Olchevski:
The app converts tweets from Twitter, text messages typed in or selected from a library into streaming text. It could be uploaded as MP4 video files to Facebook or youTube accounts, attached to a tweet to an email. These streamed text messages can not be machine read. It is for humans eyes only!