Spotify has already been addressed in the post. Stitcher was an earlier attempt by a different company to do exactly the same thing. iHeartRadio and Google Play

Spotify has already been addressed in the post. Stitcher was an earlier attempt by a different company to do exactly the same thing. iHeartRadio and Google Play are similar to each other in that neither is designed or marketed to be a podcast app. How Castbox can claim to be a podcast app but not let you put in RSS feeds is beyond me. Google Podcasts deserves its own special writeup. It's infuriating.