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Fluent Reader vs Lettura: catalog facts
Fluent Reader	Lettura
Free Free and open source under a BSD 3-clause licence. The Microsoft Store and Mac App Store…	Free Free and open source.
Windows, macOS, Linux	Windows, macOS, Linux
Works fully locally, or syncs with Inoreader, Feedbin, Fever and Google Reader API services Regular expression rules that hide, mark read or star articles automatically as they arrive	Standalone desktop app built with Tauri Free and open source with active development
Electron, so it is heavy for a feed reader The Microsoft Store version is recommended for auto-update; GitHub builds update manually	Documentation is mostly in the GitHub repository No mobile app
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License not stated
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 23, 2026

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