“You can see all the code behind the iOS app and the Android app, and modify it, make it your own, suggest a change, fix a bug, add a feature, fork it and make your own client, anything!”
Automattic bought Pocket Casts in 2021 and has now open sourced both mobile apps. Podcasts are one of the last open publishing formats left, an RSS feed anyone can host. Spotify and Apple keep trying to wall them off with exclusives. An open client is the best defense the format has.