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Castamatic vs Overcast: catalog facts
Castamatic	Overcast
Freemium A free tier is available. Full features require payment.	Freemium Free with an optional Premium subscription supporting the developer.
iOS	iOS
Generates transcripts on the device rather than sending audio away Very configurable playback and playlist behaviour	Smart Speed and Voice Boost meaningfully improve the listening experience Free with no feature paywall for core playback
iOS only Advanced features require a paid purchase or subscription	Apple platforms only, no Android or web version Podcast discovery is more limited than some competitors
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
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.