Passchain
Use security key with Bluetooth, NFC, USB or your phone secure element
| Repo: | IzzyOnDroid |
| AppID: | s1m.hwfido2provider |
| Author: | s1m |
| License: | Apache-2.0 |
| Donation: | LiberaPay |
| InRepoSince: | 2025-05-07 |
| LastRepoUpdate: | 2026-10-25 |
| LastAppUpdate: | 2026-10-25 |
| LastVersion: | 1.1.1 |
| Categories: | Security |
| APK source: | Codeberg/Forgejo/Gitea |
| Google Play: | Check if it's there |
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.
WhatsNew:
- 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
Hint: This app is available in both, F-Droid Main and IzzyOnDroid repos.
While you can download the APKs here directly, you should preferably use an F-Droid client so the app stays up-to-date on your device. Some clients have this repo enabled by default, e.g. Neo Store, Droid-ify, or, of course, the IzzyOnDroid client by Sunil. With others (like the official client) you'll have to add this repo manually (see the hint on top of the package list for how to do that).
Packages
Version 1.1.1 (2026-10-25) 
Android Versions:
- Target: 17.0
- MinVer: 14.0
- ABIs: arm64-v8a, armeabi-v7a, x86, x86_64
:
:
- none
:
- none
Permissions:
- ACCESS_COARSE_LOCATION (needed by Android in conjunction with Bluetooth)
- ACCESS_FINE_LOCATION (needed by Android in conjunction with Bluetooth)
- BLUETOOTH (required for cross-device login)
- BLUETOOTH_ADMIN (required for cross-device login)
- BLUETOOTH_ADVERTISE (required for cross-device login)
- BLUETOOTH_CONNECT (required for cross-device login)
- BLUETOOTH_SCAN (required for cross-device login)
- android.permission.INTERACT_ACROSS_PROFILES
- INTERACT_ACROSS_USERS
- INTERNET (needed for cross-device login and to verify non-browser applications)
- MANAGE_USB (to connect security keys via USB)
- NFC (to connect security keys via NFC)
- QUERY_ALL_PACKAGES (needed to get the caller signing key)
- android.permission.START_ACTIVITIES_FROM_BACKGROUND
- USE_BIOMETRIC (needed for on-device login with screen lock)
- USE_FINGERPRINT
- DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Features:
- None
Malware-Check:Passed
23 Libraries detected:
Libraries:
- Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
- AppCompat (Utility)
support newer Android features on older Android versions.
- Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
- Jetpack Compose (Development Framework)
a framework to define UIs programmatically with composable functions that describe its shape and data dependencies.
- Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
- Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
- Databinding (Utility)
bind UI components in your layouts to data sources in your app using a declarative format.
- Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
- Androidx Graphics (Utility)
leverages graphics facilities across multiple Android platform releases.
- Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
- Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
- ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
- Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
- Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
- Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
- Jetpack WindowManager Library (Utility)
enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices.
- Fido (GMS)© (Utility)
entry point for Fido (Fast IDentity Online) APIs.
- Play Services SafetyNet©Ⓝ (Utility)
library to check basic device integrity and CTS Profile match. Part of Google Play Services.
- Google Mobile Services© (Development Framework)
Google Mobile Services in terms of the Android library refers to Google Play Services, a proprietary background service and API package for Android devices which is not part of the Android Open Source Project (AOSP). The library does not contain those services (i.e. it usually requires the Google Framework, often referred to as „GApps“, being installed on the device), but allows an app to communicate with them. Be aware this usually goes along with transferring at least parts of your personal data to the Google network.
- Google Material Design (Utility)
library to help with material design guidelines.
- OkHttp (Utility)
OkHttp is an HTTP+HTTP/2 client for Android and Java applications.
- microG GmsCore (Development Framework)
a FLOSS (Free/Libre Open Source Software) framework to allow applications designed for Google Play Services to run on systems, where Play Services is not available.
- SafeParcel (Development Aid)
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Payment Modules:
- None found
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Ads & Analytics:
- None found
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Download (4 M)
Version 1.1.0 (2026-08-27)
Android Versions:
- Target: 17.0
- MinVer: 14.0
- ABIs: arm64-v8a, armeabi-v7a, x86, x86_64
:
:
- none
:
- none
Permissions:
- ACCESS_COARSE_LOCATION (needed by Android in conjunction with Bluetooth)
- ACCESS_FINE_LOCATION (needed by Android in conjunction with Bluetooth)
- BLUETOOTH (required for cross-device login)
- BLUETOOTH_ADMIN (required for cross-device login)
- BLUETOOTH_ADVERTISE (required for cross-device login)
- BLUETOOTH_CONNECT (required for cross-device login)
- BLUETOOTH_SCAN (required for cross-device login)
- android.permission.INTERACT_ACROSS_PROFILES
- INTERACT_ACROSS_USERS
- INTERNET (needed for cross-device login and to verify non-browser applications)
- MANAGE_USB (to connect security keys via USB)
- NFC (to connect security keys via NFC)
- QUERY_ALL_PACKAGES (needed to get the caller signing key)
- android.permission.START_ACTIVITIES_FROM_BACKGROUND
- USE_BIOMETRIC (needed for on-device login with screen lock)
- USE_FINGERPRINT
- DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Features:
- None
Malware-Check:Passed
23 Libraries detected:
Libraries:
- Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
- AppCompat (Utility)
support newer Android features on older Android versions.
- Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
- Jetpack Compose (Development Framework)
a framework to define UIs programmatically with composable functions that describe its shape and data dependencies.
- Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
- Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
- Databinding (Utility)
bind UI components in your layouts to data sources in your app using a declarative format.
- Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
- Androidx Graphics (Utility)
leverages graphics facilities across multiple Android platform releases.
- Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
- Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
- ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
- Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
- Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
- Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
- Jetpack WindowManager Library (Utility)
enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices.
- Fido (GMS)© (Utility)
entry point for Fido (Fast IDentity Online) APIs.
- Play Services SafetyNet©Ⓝ (Utility)
library to check basic device integrity and CTS Profile match. Part of Google Play Services.
- Google Mobile Services© (Development Framework)
Google Mobile Services in terms of the Android library refers to Google Play Services, a proprietary background service and API package for Android devices which is not part of the Android Open Source Project (AOSP). The library does not contain those services (i.e. it usually requires the Google Framework, often referred to as „GApps“, being installed on the device), but allows an app to communicate with them. Be aware this usually goes along with transferring at least parts of your personal data to the Google network.
- Google Material Design (Utility)
library to help with material design guidelines.
- OkHttp (Utility)
OkHttp is an HTTP+HTTP/2 client for Android and Java applications.
- microG GmsCore (Development Framework)
a FLOSS (Free/Libre Open Source Software) framework to allow applications designed for Google Play Services to run on systems, where Play Services is not available.
- SafeParcel (Development Aid)
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Payment Modules:
- None found
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Ads & Analytics:
- None found
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Download (4 M)
Version 1.0.1 (2026-06-09)
Android Versions:
- Target: 16.0
- MinVer: 14.0
- ABIs: arm64-v8a, armeabi-v7a, x86, x86_64
:
:
- none
:
- none
Permissions:
- ACCESS_COARSE_LOCATION (needed by Android in conjunction with Bluetooth)
- ACCESS_FINE_LOCATION (needed by Android in conjunction with Bluetooth)
- BLUETOOTH (required for cross-device login)
- BLUETOOTH_ADMIN (required for cross-device login)
- BLUETOOTH_ADVERTISE (required for cross-device login)
- BLUETOOTH_CONNECT (required for cross-device login)
- BLUETOOTH_SCAN (required for cross-device login)
- android.permission.INTERACT_ACROSS_PROFILES
- INTERACT_ACROSS_USERS
- INTERNET (needed for cross-device login and to verify non-browser applications)
- MANAGE_USB (to connect security keys via USB)
- NFC (to connect security keys via NFC)
- QUERY_ALL_PACKAGES (needed to get the caller signing key)
- android.permission.START_ACTIVITIES_FROM_BACKGROUND
- USE_BIOMETRIC (needed for on-device login with screen lock)
- USE_FINGERPRINT
- DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Features:
- None
Malware-Check:Passed
25 Libraries detected:
Libraries:
- Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
- AppCompat (Utility)
support newer Android features on older Android versions.
- Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
- Jetpack Compose (Development Framework)
a framework to define UIs programmatically with composable functions that describe its shape and data dependencies.
- Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
- Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
- Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
- Databinding (Utility)
bind UI components in your layouts to data sources in your app using a declarative format.
- Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
- AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
- Androidx Graphics (Utility)
leverages graphics facilities across multiple Android platform releases.
- Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
- Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
- ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
- Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
- Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
- Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
- Jetpack WindowManager Library (Utility)
enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices.
- Fido (GMS)© (Utility)
entry point for Fido (Fast IDentity Online) APIs.
- Play Services SafetyNet©Ⓝ (Utility)
library to check basic device integrity and CTS Profile match. Part of Google Play Services.
- Google Mobile Services© (Development Framework)
Google Mobile Services in terms of the Android library refers to Google Play Services, a proprietary background service and API package for Android devices which is not part of the Android Open Source Project (AOSP). The library does not contain those services (i.e. it usually requires the Google Framework, often referred to as „GApps“, being installed on the device), but allows an app to communicate with them. Be aware this usually goes along with transferring at least parts of your personal data to the Google network.
- Google Material Design (Utility)
library to help with material design guidelines.
- OkHttp (Utility)
OkHttp is an HTTP+HTTP/2 client for Android and Java applications.
- microG GmsCore (Development Framework)
a FLOSS (Free/Libre Open Source Software) framework to allow applications designed for Google Play Services to run on systems, where Play Services is not available.
- SafeParcel (Development Aid)
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Payment Modules:
- None found
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Ads & Analytics:
- None found
a mechanism to serialize objects on the Android platform into Parcelables version-agnostic.
Download (3.3 M)