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Vienna RSS vs Reeder Classic: catalog facts
Vienna RSS	Reeder Classic
Free Free and open source under the Apache licence.	Paid A one-time purchase is required, per platform.
macOS	macOS, iOS
Smart folders assemble articles from any feed by criteria you define Native Mac application rather than a web wrapper	Traditional folders and unread counts rather than a timeline Supports nearly every sync back end, including self-hosted ones
macOS only Sync support is limited compared with commercial readers	Sold separately from the newer Reeder, and no longer developed as actively 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.