The transcript
Every episode Feedcast prepares is transcribed with the speech framework that ships with macOS. That is why a transcript costs nothing and counts against no quota: the work happens on your own machine, in the background, while you do something else. On Apple silicon a faster speech model downloads once, about 600 MB, and it also understands an ad read in another language.
What you get is not a wall of text but a timed list in the Transcript tab, right under the player. Each line carries the second it was spoken, the current line is marked as the episode plays, and clicking any line moves the player there. Search inside it and every match is highlighted in place, with arrows to step from one to the next, so “somewhere in the middle they talked about the iPhone grip” becomes a click. The lines of a removed ad are hidden, because they are no longer in the episode.
The transcript does not stay on the Mac. Feedcast adds it to your feed, timed to the cleaned episode, so podcast apps that show transcripts, such as Pocket Casts, show it on your phone.
Chapters a show already has
When a podcast ships chapters, Feedcast keeps them as they are, including the artwork some shows attach to each one. They are not rewritten, not renamed, and not replaced by anything Feedcast could generate. They move only when a sponsor read is cut out from underneath them, by exactly the length of the cut, and a chapter the ad had split in two becomes one again.
Edit Chapters is the editor for the rest: retitle a chapter, move a mark to where the segment really starts, add one the show forgot, or give a chapter its own image from the gallery. The player at the top is the same one as in the main window, with the waveform as the scrubber, so you can find the spot by ear.
Chapters an episode never had
Plenty of shows ship none at all. For those, Feedcast reads the finished transcript and writes a chapter list: where the conversation turns, what the new subject is, and the second it starts. You get titles that describe the episode rather than “Part 2”, the first one says it was generated by Feedcast, and Transcript & AI Chapters lets you check them against the text, side by side.
This step leaves your Mac. The transcript text, never the audio, goes to Feedcast’s server, where a language model returns the list. The same pass marks the sponsor reads, which is how sponsor removal works on shows without chapters. Generated chapters are a Premium feature with a monthly allowance of about 175 hours of media, and the Mac App Store version includes them on your first five episodes. Episodes that already have chapters are left alone, unless you ask Feedcast to replace chapters that mark ads with a clean set.
They travel with the episode
Chapters are written into the file itself, not kept in a Feedcast database, so they arrive intact in Apple Podcasts, Overcast, Pocket Casts, Castro and anything else that reads chapter marks. Skip to the interview from your phone, on a walk, in an app Feedcast has never heard of.
See how the sponsor removal that reshapes those chapters works, or how the finished episode reaches your phone through a private podcast feed.