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 mychjp.com:
This app provides everyday Chinese sentences, and sample conversations encountered by the first time traveler in nearly all types of contemporary social situation and conversational interaction.Talking in Chinese is an essential pocket guidebook for tourists, businesspeople, and anyone developing an interest in China. It features commonly used pinyin romanization, English equivalent, and simplified Chinese characters.