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Vienna RSS vs Fiery Feeds: catalog facts
Vienna RSS	Fiery Feeds
Free Free and open source under the Apache licence.	Freemium A limited free version is available. Full features require a paid subscription.
macOS	macOS, iOS
Smart folders assemble articles from any feed by criteria you define Native Mac application rather than a web wrapper	Supports an unusually long list of sync back ends Smart views and hot links surface what is worth reading
macOS only Sync support is limited compared with commercial readers	Most features require the paid subscription Apple platforms only
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	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.