The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Crowded Road:
Featured in the Apple iTunes 'New & Noteworthy' Section Weather Clock HD: Retina Display Edition is the stunning clock and weather application that compliments the beauty of the iPhone. FEATURES Stunning flip clock with animation in black or white modes. 12 or 24 hour modes with world time zones. Fahrenheit or Celsius Many, many stunning HD backgrounds to choose from INSTRUCTIONS To add or delete cities, click on the "Settings" icon on the top left. Navigate between cities using the arrows at the top of page. Change views by swiping left or right. There are 3 views: default, weather forecast and weather only. Please contact us if you have any feedback or feature requestes. We are here to make this the best iPhone weather app possible!