Podcast URL Schemes on iOS

This post was published more than a few years ago (on 2012-12-12) and may contain inaccurate technical information, outmoded thoughts, or cringe takes. Proceed at your own risk.

I'm updating an app to make it easier to subscribe to a podcast in your listener app of choice, and am trying to see which URL schemes work with which apps. So far, I have:

If you have other apps and URL schemes that will open podcast feed URLs on iOS, I'd love to know about them in the comments.