Passchain

Use security key with Bluetooth, NFC, USB or your phone secure element

New in version 1.1.1

- Update microg lib:
- Fix some QR-code logins
- Fix authentication with a hardware key after screen-lock registration
- Correctly require biometric for screen-lock registration
- Fix login/registration on platforms supporting unknown key alg
- Fix registration on Chromium-based browser, to mitigate their issue
- Add, update CS, RU translations

Passchain is a credential provider that allows you to use your USB/NFC security key or your phone secure element for passkeys/fido2/u2f authentication.

Bluetooth keys aren't supported yet.

This app doesn't need the Play Services.

Once installed, go to your system settings > Passwords, passkeys and accounts, then enable Passchain.

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Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

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Version 1.1.1 (14) suggested Added on Oct 29, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 14 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- access approximate location only in the foreground
  
  This app can get your approximate location from location services while the app is in use. Location services for your device must be turned on for the app to get location.
- access precise location only in the foreground
  
  This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
- pair with Bluetooth devices
  
  Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
- access Bluetooth settings
  
  Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
- advertise to nearby Bluetooth devices
  
  Allows the app to advertise to nearby Bluetooth devices
- connect to paired Bluetooth devices
  
  Allows the app to connect to paired Bluetooth devices
- discover and pair nearby Bluetooth devices
  
  Allows the app to discover and pair nearby Bluetooth devices
- android.permission.INTERACT_ACROSS_PROFILES
- android.permission.INTERACT_ACROSS_USERS
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- android.permission.MANAGE_USB
- control Near Field Communication
  
  Allows the app to communicate with Near Field Communication (NFC) tags, cards, and readers.
- query all packages
  
  Allows an app to see all installed packages.
- android.permission.START_ACTIVITIES_FROM_BACKGROUND
- use biometric hardware
  
  Allows the app to use biometric hardware for authentication
- use fingerprint hardware
  
  Allows the app to use fingerprint hardware for authentication
- s1m.hwfido2provider.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 4.0 MiB PGP Signature | Build Log

New in version 1.1.1-rc1

- Update microg lib:
- Fix some QR-code logins
- Fix authentication with a hardware key after screen-lock registration
- Add, update CS, RU translations

Version 1.1.1-rc1 (13) - Added on Oct 08, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 14 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- access approximate location only in the foreground
  
  This app can get your approximate location from location services while the app is in use. Location services for your device must be turned on for the app to get location.
- access precise location only in the foreground
  
  This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
- pair with Bluetooth devices
  
  Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
- access Bluetooth settings
  
  Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
- advertise to nearby Bluetooth devices
  
  Allows the app to advertise to nearby Bluetooth devices
- connect to paired Bluetooth devices
  
  Allows the app to connect to paired Bluetooth devices
- discover and pair nearby Bluetooth devices
  
  Allows the app to discover and pair nearby Bluetooth devices
- android.permission.INTERACT_ACROSS_PROFILES
- android.permission.INTERACT_ACROSS_USERS
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- android.permission.MANAGE_USB
- control Near Field Communication
  
  Allows the app to communicate with Near Field Communication (NFC) tags, cards, and readers.
- query all packages
  
  Allows an app to see all installed packages.
- android.permission.START_ACTIVITIES_FROM_BACKGROUND
- use biometric hardware
  
  Allows the app to use biometric hardware for authentication
- use fingerprint hardware
  
  Allows the app to use fingerprint hardware for authentication
- s1m.hwfido2provider.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 4.0 MiB PGP Signature | Build Log

New in version 1.1.0

- Fix security issue (more on this later)
- Add list and management of on-device credentials
- Add dialog to select credential from USB/NFC key
- Bump dependencies, and target SDK 37
- Add/Update AR, CS, DE, ZH-rCN translations
- Some other bugfixes

Version 1.1.0 (12) - Added on Sep 05, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 14 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- access approximate location only in the foreground
  
  This app can get your approximate location from location services while the app is in use. Location services for your device must be turned on for the app to get location.
- access precise location only in the foreground
  
  This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
- pair with Bluetooth devices
  
  Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
- access Bluetooth settings
  
  Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
- advertise to nearby Bluetooth devices
  
  Allows the app to advertise to nearby Bluetooth devices
- connect to paired Bluetooth devices
  
  Allows the app to connect to paired Bluetooth devices
- discover and pair nearby Bluetooth devices
  
  Allows the app to discover and pair nearby Bluetooth devices
- android.permission.INTERACT_ACROSS_PROFILES
- android.permission.INTERACT_ACROSS_USERS
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- android.permission.MANAGE_USB
- control Near Field Communication
  
  Allows the app to communicate with Near Field Communication (NFC) tags, cards, and readers.
- query all packages
  
  Allows an app to see all installed packages.
- android.permission.START_ACTIVITIES_FROM_BACKGROUND
- use biometric hardware
  
  Allows the app to use biometric hardware for authentication
- use fingerprint hardware
  
  Allows the app to use fingerprint hardware for authentication
- s1m.hwfido2provider.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 4.0 MiB PGP Signature | Build Log

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