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 i-CRG Labs:
Its time to say goodbye to your conventional artificial clocks. Natural Clocks turns your iPhone into amazing clock which you have never seen before, beautifully designed with top quality engineered graphics to make your time special. It has different unique stunning themes which represent each clock naturally with nature driven relaxation philosophical touch along with soothing background music. It also supports multiple alarm with different variety of sounds.Features Include :Different attractive nature themes.Attractive specially crafted night mode themes.Customizable auto-lock theme.Animation ON/OFF.Supports both digital & analog themes.Relaxing background music.Loaded with touch and feel good phenomena.Multiple alarm supported.Retina Support!Tips: Swipe to view the different clocks.