For those on Android, and feeling like they are missing out, PocketCasts is a great alternative.
Recently they made their apps opensource as well.
https://github.com/Automattic/pocket-casts-android
https://github.com/Automattic/pocket-casts-ios
There's a few other nits with PocketCasts for example, played files don't show up in listening history, but overall it's a solid podcasting app.
https://marco.org/2019/04/27/overcast-clip-sharing
For those on Android, and feeling like they are missing out, PocketCasts is a great alternative.