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 Engin Deveci:
"Trend Watch" is a tool to help you follow trending topics all over the world. With Trend Watch, you can follow trending topics and recent tweets worldwide, per country or even per city. Using easy to use functions of Trend Watch, you will be able to follow the trends and also share them via Facebook, Twitter and other popular social networks. Sharing is easy, just click on the tweet and you'll see a bunch of sharing options. If you want to comment on the trend, just tap on the trend hashtag and you can publish your tweet immediately. If there's a small button on the right hand side of the tweet, you can watch the video, see the picture or visit the web site associated with the tweet. These small buttons appear once there's a media content associated with the tweet. I hope you'll enjoy Trend Watch. Please let us know how we can improve the tool for you.