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 First Peoples' Heritage Language and Culture Council:
The Skidegate Haida Language app is a media-rich bilingual dictionary and phrase collection comprised of words and phrases archived at the online Aboriginal language database FirstVoices.com. Word and phrase definitions are illustrated with audio recordings, images and videos. Editing features allow users to customize content by replacing default multimedia with personal pictures, videos and sounds using either the camera and microphone built into their device or images from their onboard photo collection.