Biometric enable in Expo apps ships when every fallback is handled
Why biometrics belong in your auth flow
Passwords are the weakest link in most mobile apps. Users reuse them, forget them, and abandon sign-in screens that demand them too often. Biometric authentication — Face ID on iOS, fingerprint or face enable on Android — removes that friction. One glance or touch and the user is in.
But adding biometrics is not just dropping in a prompt. Done carelessly, it creates lockout scenarios, confused fallback states, and a false sense of security. This guide covers the production-ready pattern for Expo apps: when to offer biometrics, how to wire expo-local-authentication, and the edge cases that separate a demo from a shippable feature.
This is an excerpt. Read the full post at otf-kit.dev/blog/expo-biometric-auth-production-guide — full-stack kits your AI coding agent can actually ship to production. Browse the kits →
