App lock (one setting)
Set enableBioMetricAuth to true in Config.swift / Config.java and the app asks for Face ID, Touch ID or the fingerprint every time it opens. Nothing to change in your app.
Guides by tool
Biometric login for Lovable appsLovable turns a chat prompt into a full-stack web app and hosts it for you.Biometric login for Bolt appsBolt.new by StackBlitz builds and deploys full-stack web apps from prompts in the browser.Biometric login for v0 appsv0 by Vercel generates React and Next.js apps from prompts and deploys them to Vercel in one click.Biometric login for Replit appsReplit Agent builds full-stack apps from a prompt and Replit Deployments host them.Biometric login for Base44 appsBase44 (a Wix company) builds complete apps with built-in database, auth and hosting from a chat prompt.Biometric login for Cursor appsCursor is the AI code editor many vibe coders use to build web apps with agents and Composer.Biometric login for Claude Code appsClaude Code and Claude's artifacts let you build complete web apps from the terminal or the chat.Biometric login for ChatGPT & Codex appsChatGPT (Canvas) and OpenAI Codex write and refactor complete web apps that you deploy yourself.
Two ways to use biometrics
JavaScript API (bioauth://)
Call bioauth:// from your web app before showing a sensitive screen; WebViewGold calls onBioAuthSuccess(), onBioAuthFailure(code, message) or onBioAuthUnavailable() in your page. Combine with your auth provider session for a "unlock with your face" login.
A visible native feature
Biometric login is one of the clearest answers to Apple's Guideline 4.2: it is something a Safari tab cannot do, and reviewers notice it on the first screen.
Add biometric unlock to your app
About 15 minutes.
Decide what to protect
Whole app (app lock) or specific screens such as account settings, payment details, health data or a private journal (JavaScript API). Many apps combine both: lock on launch, re-check before sensitive actions.
Add the Face ID usage description (iOS)
In the WebViewGold Xcode project add the "Privacy – Face ID Usage Description" key to Info.plist with a sentence that explains why the app uses Face ID. Without it Face ID is not available. The Cloud Builder has a field for this text.
Implement the callbacks in your app
Define
onBioAuthSuccess,onBioAuthFailureandonBioAuthUnavailableas global JavaScript functions and navigate tobioauth://when the protected screen loads. Show the screen on success, a fallback (password) otherwise.Keep the session alive
Biometrics replace typing the password, not the session: keep the user logged in with your auth provider and use the biometric check as a local gate. Never grant access on the web side without the native callback.
Test on real devices
Simulators can enroll a fake Face ID (Features → Face ID), but test on an iPhone and an Android phone with a fingerprint, including the "no biometrics enrolled" case.
Frequently asked questions
Do I need Face ID for App Store review?
No, but it helps. Guideline 4.2 asks for functionality beyond a website; biometric login, push notifications and offline handling are the native features reviewers see first.
Does it work with my your app login?
Yes. The biometric check is independent of the auth provider: your auth provider keeps the session, WebViewGold adds the local unlock in front of it.
What if the user has no Face ID set up?
iOS falls back to the device passcode in the app-lock mode; with the JavaScript API you get onBioAuthUnavailable() and show your own fallback.
Three ways to get your app into the stores
Same result, different amount of work on your side. All three come with the approval guarantee and 24/7 human support.
Do it yourself
$109 per platform, one-time
The WebViewGold license: a finished Xcode or Android Studio project. Paste your URL, set name and icon, switch on features, build and submit. Free updates forever.
See plans on the main pageCloud Builder
$349 per license, one-time add-on
No Mac, no Xcode, no Android Studio: configure in the browser, we build both apps in the cloud and hand them to App Store Connect and the Play Console.
How the Cloud Builder works Try the free demoFull Service
$698 per platform $798
Send us your URL and icon. Our team configures, builds and delivers your app within 72 hours, white-label, with source projects. Both platforms for $1,158.
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