Devhelp is a free and open source API documentation application for Linux. Using this you can navigate through libraries and to search by function, struct, or macro. You don’t need active internet connection to use Devhelp. All are installed locally for offline use. It works with GTK-Doc well and you can integrate it with other applications such as Glade, Builder or Anjuta, and plugins are available for text editors like gedit, Vim, Emacs, Geany and more.
Install Devhelp on Ubuntu Linux
Devhelp is available as a flatpak app from flathub. First install flatpak and flathub if you don’t have them. After the installation restart your system. Follow below link for flatpak installation steps.
Open your terminal command-line application (ctrl+alt+t) and run below Devhelp flatpak installation command. It will install the latest version of Devhelp on your Ubuntu based system.
flatpak install flathub org.gnome.Devhelp
After that you can run this command to start Devhelp developer tool.
flatpak run org.gnome.Devhelp
You can also uninstall it via
sudo flatpak uninstall org.gnome.Devhelp