Best way to add and download podcasts from a RSS-feed (e.g. podcatcher addon)

Several threads here already address this question, but I did not really find a satisfying answer.
I know that it is possible to add podcasts (available as RSS feeds) as video or audio sources. However, I did not find a way to download these files to watch them offline.
The only addon I found was “Apple iTunes Podcasts”, but first of all it only provides certain podcasts and gives no possibility to add one’s own and second I did not find a way to download episodes from the podcasts.
Is this something nobody wants?? How is it possible there’s no podcatcher addon which enables the user to add podcasts via RSS-feed and download them. I think Kodi is one of the best media player software and organizing video podcasts seems to be one of the most basic functions every media center should provide.

Any help with this is greatly appreciated!