The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From James Savage:
Up is a full-featured CloudApp client, beautifully designed for iOS 7. Upload photos, videos, and more; view and edit your drops, and manage your account, all from your iPhone, iPad, or iPod touch. Upload saved photos and videos and copied images, links, and text. Tap and hold a drop to rename, share, or delete it.Accidentally delete or rename something? Just shake to undo. Open drops in other apps like Pages or iBooks, and easily upload from other apps that support "Open In...". Upload faster, tap and hold the + button to instantly upload either your last saved photo or copied item.Integrate with other apps using x-callback-url, (documentation available at http://axiixc.com/apps/up).