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GeoWallpaper is a simple and easy to use App that brings photo of the day of National Geographic to you, and set the photo as your wallpaper! GeoWallpaper also runs under Windows and MacOS, just google it!
-Autoupdate function that downloads lasted photo for you in background.
-Gallery view supports pinck zoom in/out.
-Build-in crop function.
-Set as wallpaper.
-Detail of the photo.
-Share the photo via Email, Facebook and so on.