If you have an older Ubuntu or Ubuntu derivative, you may have to install snapd before installing pixbuf.
snap install pixbuf in terminal should install the app.
PIXBUF is a simple way to share your photos and visual marketing content to all major social networks (Facebook, Twitter, Pinterest, Tumblr, Instagram) and photography services (500px, Flickr, Youpic, Deviantart) with one tap. Upload, Share and Analyse your photos from any device, from anywhere in the world.
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