Unlike Player FM, this app is fully open-source, with its source code available at https://github.com/AntennaPod.
The app is available both from F-Droid store and at the Google Play Store.
The UI is simple, allowing you to search and subscribe to podcasts. How many podcasts to download regularly and storage issues can be managed in the settings.
In the podcast playing UI the playback speed can be customized. This is an important feature for me since I like to listen at 1.5-2x speeds.
I am not an avid podcast listener, I just catch up on a handful of podcasts once in a while and I found that this simple podcast app fits my needs.
Tried with: AntennaPod 2.7.1