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 DFI Group:
More than 2500 amazing illusion pics in this App!This application has the largest number of illusions pics in the App Store! Pro version contains 20+ catalogs: - Eye Tricks - Impossible objects - Stereograms - 3D Drawings - 3D Anaglyph pictures - 3D anaglyph museum - Art of Jim Warren - Art of Josephine Wall - Art of Rob Gonsalves ...and others Features: Does not require an internet connection Simple, convenient interface Favorites function Slideshow mode Any picture can be saved in the photo library Any picture can be used as wallpaper Several view modes A huge number of pictures All illusions are sorted into groups Pro version features: Application contains unique 3D Anaglyph Museum More pictures (Regular version includes 1500+ images) 8 New catalogs