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Castbox vs gPodder: catalog facts
Castbox	gPodder
Freemium A free ad-supported tier is available. Premium is a paid subscription.	Free Free and open source under the GPL.
Android, iOS, Web	Windows, macOS, Linux
In-audio search finds spoken phrases inside episodes Works on phones, web, Alexa, CarPlay and Android Auto	Downloads to plain files, so any player and any backup tool works Cross-platform with optional subscription sync through gpodder.net
Advertising and recommendation-heavy interface on the free tier Closed source	Plays through external players rather than having a polished built-in one Interface is utilitarian
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.