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.
Are you an iPhone or Mac developer? Do people email you crash files? Would you like to be able to read these crash files on your iOS device?You can't symbolicate crashes using this CrashReader app, but you can open and look over the crash report, which can give you a hint at what your user is running into. If you're out and about, you don't have to wait until you can get back to your computer and check things out.