Sponder - Filter and transform RSS feeds or Podcasts (https://sponder.app)

Different RSS clients provide different filtering options, and lots of them limit you to a few keywords and/or put them behind a $7-12/mo subscription. I'm building Sponder so you can curate what you see, and it just presents another RSS feed, so you can keep using your favorite client but fill in the feature gaps.

Right now it can merge and filter by string or regex, and next I'm building (because it's what I want) history replay and smarter podcast rerun detection. it's new and I'm very open to feedback and feature requests.