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Authenticator vs FreeOTP: catalog facts
Authenticator	FreeOTP
Free Free and open source under the GPL 3.0 or later.	Free Free and open source.
Linux	Android, iOS
Supports both TOTP and HOTP codes Fits in with the GNOME desktop	Open source with public repositories for both apps Available on F-Droid as well as Google Play and the App Store
Built for Linux desktops only Codes live on the desktop rather than on a phone you carry	Mobile only, no desktop app Minimal project website with little documentation
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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