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FreeOTP vs Yubico Authenticator: catalog facts
FreeOTP	Yubico Authenticator
Free Free and open source.	Free The app is free; it requires a YubiKey, which is bought separately.
Android, iOS	Windows, macOS, Linux, Android, iOS
Open source with public repositories for both apps Available on F-Droid as well as Google Play and the App Store	Secrets stay on the hardware key rather than the device Same codes available on any machine where the key is plugged in
Mobile only, no desktop app Minimal project website with little documentation	Requires a YubiKey Losing the key loses access to the stored codes unless you have a backup
Downloadable app	Downloadable app
Open source	Closed source
License not stated	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 23, 2026	Official website Full listing and sources Checked September 24, 2026

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