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 Adil Khanov:
The entire Quran in Arabic that gives you an ability to listen to and read all 114 surahs on your device anytime and anywhere. 1) NO Internet connection required to listen or to read. Full OFFLINE mode support. 2) Audio is in: Arabic 3) Text is in: Arabic 4) All iOS Devices supported: iPad iPhone iPod touch 5) Additional features: Listen to surahs either one by one in a loop or by one sura in a loop or on demand Listen to surahs either on devices built-in speakers or by using headphones Keep listening to surahs when device goes to stand-by mode Set desired font size for the text accross whole app Continue reading last viewed sura upon starting app Copy any part of text and Paste it to a desired app