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 CTT Source Technology Corp.:
Application description DrawProPlus provides an easy and effective tool to practice drawing and writing on screen . KEY FEATURES: Drawing and writing on screen provides the basis for more creative activities "Setting " button provides RGB colour and line width slide bar selection for drawing and writing Easily erase drawing and writing with eraser button Open your Photo Albums, selected photo to be as a drawing pattern. Button "remove pic" clean photo on screen. After press save button , your masterpiece will be saved in your Saved Photos directory of Photo Albums.