Expo Passkey

Expo Passkey is a cross-platform (iOS, Android, Web) module designed for Expo applications, providing comprehensive FIDO2/WebAuthn passkey authentication. It seamlessly integrates with the Better Auth ecosystem, offering an end-to-end solution for modern, frictionless biometric and platform authenticator-based login experiences. Currently at version 0.3.12, the package maintains an active development pace, demonstrated by recent critical security patches and breaking changes introduced in October 2025. Key differentiators include its unified passkey table structure that operates consistently across all supported platforms, seamless synchronization with iCloud Keychain and Google Password Manager for cross-device portability, and granular client-controlled WebAuthn security preferences, all built upon a robust framework emphasizing session-validated security for critical operations like registration and revocation.