microG GmsCore is a free software reimplementation of Google Play Services. It allows applications calling proprietary Google APIs to run on AOSP-based ROMs like .
Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Android


Passchain is described as 'Credential provider that allows you to use your USB/Bluetooth/NFC security key for passkeys/fido2/u2f authentication' and is an app in the security & privacy category. There are three alternatives to Passchain for Android, Android Tablet, Android Wear and F-Droid. The best Passchain alternative is microG, which is both free and Open Source. Other great apps like Passchain are Authnkey and Google Play Services.
microG GmsCore is a free software reimplementation of Google Play Services. It allows applications calling proprietary Google APIs to run on AOSP-based ROMs like .


Google Play Services is a proprietary background service and API package for Android devices from Google. Google Play Services provides core functionality like authentication, contacts synchronization, and location based services.

works without google play services, microG or other system components!