Exist has great attributes related to reading, listening to music, and more, but no attribute related specifically to podcasts - a unique category. Consider adding it and tracking time listened on popular podcast/audio apps.
Podcast Addict seems to have no API available to get those stats out of the app unfortunately.
What about using Spotify for podcasts?
+1 for Spotify Podcasts, I really dig that idea! Even though it won’t happen (for good reasons) I would also love to see a direct integration of Spotify, so last.fm would no longer be needed.
I don’t know that we’ve found any that has an API yet at all unfortunately.
Does the Apple Podcast app have an API?
It seems not.