Ubuntu 18.04 is the first release to include my app, PikoPixel (pixel-art editor), in its repository (universe): https://packages.ubuntu.com/bionic/gnustep/piko

Ubuntu 18.04 is the first release to include my app, PikoPixel (pixel-art editor), in its repository (universe): https://packages.ubuntu.com/bionic/gnustep/pikopixel.app https://packages.ubuntu.com/bionic/gnustep/pikopixel.app I had to tweak PP's packaging to get it to appear in the Ubuntu Software app, so I can provide a bit of info about this part of the article: My assumption for now is that the Ubuntu Software application only shows updates for packages that were installed through it. Further, the list of installed applications that it shows is very clearly a subset of those that are actually installed on the system. Color me befuddled. The Ubuntu Software app (& similar software-center apps, such as GNOME Software, KDE Discover, etc.) only shows distro packages which have valid AppStream metadata: https://en.wikipedia.org/wiki/AppStream https://en.wikipedia.org/wiki/AppStream The AppStream metadata is generated automatically by running appstream-generator (https://github.com/ximion/appstream-generator https://github.com/ximion/appstream-generator ) on Ubuntu's repositories. However, on some packages the metadata can't be generated, due to an error - either the package has missing info, incorrect formatting, or possibly it's an issue with appstream-generator. Here's a list of packages in the Ubuntu Bionic universe repo that have issues (packages with errors are unlikely to appear in Ubuntu Software): http://appstream.ubuntu.com/bionic/universe/issues/index.html http://appstream.ubuntu.com/bionic/universe/issues/index.htm... List of packages with successfully generated metadata in Ubuntu Bionic universe (should appear in Ubuntu Software): http://appstream.ubuntu.com/bionic/universe/metainfo/index.html http://appstream.ubuntu.com/bionic/universe/metainfo/index.h... (Package names link to the generated metadata xml file).