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 ALSEDI Group:
Rabbit Clock 2 is a simple application displaying Time and Date with amazing rabbits designed by Simon Oxley. It's FREE, give it a try! FREE version includes: One random rabbit specific to your iPhone Prevent iPhone snooze option Show seconds and date options Upgrading for just $0.99 unlocks: 12 rabbits to choose from 8 colorful backgrounds Change image hourly or daily option Save image to Photo library feature Hints: Double tap the screen to change rabbit and background. Tap-n-hold for 3 seconds to save image to Photo library. Than, use Photos application to set as your iPhone home or lock screen wallpaper. If you have any questions or feature requests, please feel free to contact us at firstname.lastname@example.org