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OpenCat vs Fello AI: catalog facts
OpenCat	Fello AI
Freemium Free to download; check the App Store listing for paid features.	Freemium Free to start, with paid access for more use.
macOS, iOS	macOS, iOS
Native app on Mac, iPhone and iPad Voice chat and image chat	Many AI models from one subscription Floating chat bar that works over any Mac app
Apple platforms only Pricing details not stated on the homepage	Apple platforms only Closed source and dependent on third-party model providers
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	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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