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Microsoft Authenticator vs FreeOTP: catalog facts
Microsoft Authenticator	FreeOTP
Free Free app from Microsoft for Android and iOS.	Free Free and open source.
Android, iOS	Android, iOS
Passwordless sign-in for Microsoft and work accounts Commonly required by employers using Microsoft sign-in	Open source with public repositories for both apps Available on F-Droid as well as Google Play and the App Store
Mobile only, with no desktop app Most useful inside the Microsoft account ecosystem	Mobile only, no desktop app Minimal project website with little documentation
Downloadable app	Downloadable app
Closed source	Open 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 23, 2026

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