Kasts is a free and open source podcast application for Linux. It comes with episode management, play queue, sync playback with nextcloud, gpodder support, sleep timer support, auto podcast update, variable playback speed, id3v2tag support, build-in podcasts search, option to clear cache and more. It is a kde project and released under GNU General Public License v2.0 or later
How to Install Kasts on Ubuntu Linux
Kasts is available via flatpak package from remote flathub repository. You need to install the latest version of flatpak your system before the installation of any flatpak app. Follow below link for flatpak and flathub installation instructions.
Restart your system. After restart open your terminal app (ctrl+alt+t) and run below Kasts podcast app flatpak installation command.
flatpak install flathub org.kde.kasts
Start Kasts Podcast app using this command.
flatpak run org.kde.kasts
And you can laso uninstall it using
sudo flatpak uninstall org.kde.kasts