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 Mark Bunch:
Need a mustache, but don't have the time to grow one? Just use InstaStache, and BAM! Your problem will be solved. As everybody knows all pictures can be improved with a mustache. So download InstaStache now and you can choose from over 100 high quality mustaches and you can even add filters to give your photos some extra style.*** Credit to Jeanine&preston for the image in the first screenshot, Mr.nomind for the second, vanessa_hutd for the third, and lemonhalf for the last. They can be found on Flickr