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RSS Guard vs Vienna RSS: catalog facts
RSS Guard	Vienna RSS
Free Free and open source under the GPL 3.0.	Free Free and open source under the Apache licence.
Windows, macOS, Linux	macOS
Client for Feedly, Inoreader, FreshRSS, Miniflux, Nextcloud News and more Built-in mpv-based podcast player for audio and video	Smart folders assemble articles from any feed by criteria you define Native Mac application rather than a web wrapper
The interface exposes a great deal at once A desktop program, so there is no syncing unless you use a service account	macOS only Sync support is limited compared with commercial readers
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: Apache-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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