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Authnkey

Authnkey is a free, open-source security app for Android. Passkey credential provider for hardware security keys. It has 291 GitHub stars and is released under the MIT license, and you can install it from F-Droid.

github.com/mimi89999/Authnkey (opens in a new tab)

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About Authnkey

Authnkey is a credential provider that lets you use FIDO2 security keys (like YubiKey, SoloKey, Nitrokey, or Token2) for passkey authentication on Android. Many security keys don't fully work on Android: no PIN entry, no passkeys, just basic tap-to-authenticate. Authnkey fixes that. Install it, enable it in your phone's settings, and your FIDO2 security key or smartcard gains full passkey support over NFC and USB, including PIN and fingerprint verification and stored passkeys. You can also manage your key right from the app: view and delete stored passkeys, and set or change its PIN. Requires Android 14+ and a FIDO2-compatible security key or smartcard.

Privacy and F-Droid

F-Droid builds Authnkey from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.

No anti-features flagged on the latest F-Droid build.

Screenshots

  • Authnkey screenshot 1
  • Authnkey screenshot 2
  • Authnkey screenshot 3

Screenshots from the app's F-Droid listing.

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FAQ

Authnkey FAQ

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Is Authnkey free and open source?

Yes. Authnkey's source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.

How do I install Authnkey?

You can install Authnkey from F-Droid (package pl.lebihan.authnkey); the links are on this page.

Is Authnkey still maintained?

The repository's most recent commit was on Aug 24, 2026. Its F-Droid listing was last updated on Aug 27, 2026. appsgit only lists apps whose repository had a commit in the last six months.