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 River Rock Logic:
Sync Photo downloads images from your SmugMug account to your IOS device so that the images can be viewed locally. Once you login to that account from SyncPhoto, it is a fast efficient way to copy selected galleries from your SmugMug account to your iPhone, iPad or iPod Touch. Photos can be quickly viewed much like a photo roll. There is no delay waiting for each photo to download since the photos have been downloaded during the synchronize step.Photos can be downloaded at higher resolutions to allow greater zooming-in on an image. Larger images are slower to flip from one to the next however. Image EXIF data such as exposure and ISO can be displayed per image.Photos can be automatically rotated to match the screen aspect ratio ensuring that they fill the screen to the fullest extent. Photos can also be zoomed to fill the screen so that there is no blank border area showing across the bottom or side of a photo.The home page view can show a list of top level folders ( Categories ) or a list of all Galleries downloaded. Sync Photo is not affiliated with or endorsed by SmugMug, Inc.