Biometric Unlock
How to enable Face ID, Touch ID, or fingerprint unlock for the Forbidden Finance app, and how it differs from login authentication.
Overview
Biometric unlock lets you return to the Forbidden Finance app using Face ID, Touch ID, or your device's fingerprint sensor instead of re-entering your password. It activates when you switch back to the app after it has been in the background, preventing someone from picking up your phone and seeing your financial data.
Biometric unlock is a convenience feature that adds a layer of protection on top of your existing login. It is not a replacement for your password, passkey, or MFA -- those are required when you log in from scratch, switch devices, or after a session expires.
How to Enable Biometric Unlock
Open Security Settings
Go to Settings > Security > Biometric Unlock in the Forbidden Finance app.
Toggle biometric unlock on
Enable the Biometric Unlock toggle. Your device immediately prompts you to authenticate with Face ID, Touch ID, or fingerprint to confirm.
Confirm the biometric prompt
Complete the biometric verification. Biometric unlock is now active.
When Biometric Unlock Triggers
Biometric unlock activates in these situations:
| Scenario | Biometric Prompt? |
|---|---|
| You switch away from the app and come back | Yes |
| You lock your phone and unlock it to the app | Yes |
| The app is in the background for more than a few seconds | Yes |
| You are actively using the app | No |
| Your session expires (30-minute inactivity or 8-hour cap) | No -- full login required |
| You log out manually | No -- full login required |
| You open the app on a new device | No -- full login required |
Supported Platforms
| Platform | Biometric Method |
|---|---|
| iPhone | Face ID or Touch ID |
| Android | Fingerprint sensor or face recognition |
| iPad | Face ID or Touch ID |
| Web (desktop) | Not available -- use a passkey for quick re-authentication |
How to Disable Biometric Unlock
Open Security Settings
Go to Settings > Security > Biometric Unlock.
Toggle biometric unlock off
Disable the toggle. You may be prompted to authenticate one final time to confirm the change.
Tips
Frequently Asked Questions
Is biometric unlock the same as a passkey?
No. They are different features. A passkey is a login credential that replaces or supplements your password for signing into your account. Biometric unlock is a convenience lock that protects the app when you resume it after switching away. Both use your device's biometrics (Face ID, Touch ID, fingerprint), but they serve different purposes. You can and should use both.
Does biometric unlock work if my session expires?
No. When your session expires (after 30 minutes of inactivity or 8 hours total), you need to log in again with your password, passkey, or MFA. Biometric unlock only applies within an active session.
Can I use biometric unlock on the web?
No. Biometric unlock is available only on iOS and Android. On the web, use a passkey for quick sign-in, and consider enabling the "Remember me" option to keep your email pre-filled.
What if biometric unlock stops working?
First, check that your device's biometric settings still have your face or fingerprint enrolled. If they do, try toggling biometric unlock off and on again in Forbidden Finance settings. If the issue persists, see the Login Problems guide.
Does enabling biometric unlock make my account less secure?
No. Biometric unlock adds a layer of protection for app resumption. It does not weaken your password, passkey, or MFA. Without biometric unlock, anyone who picks up your phone while the app is in the foreground can see your data. With it enabled, they would need your face, fingerprint, or device PIN.
Related Articles
Passkeys
Set up a passkey for secure, passwordless login.Privacy Mode
Hide monetary amounts on the dashboard.Session Management
Understand session timeouts and device management.Security Overview
See all security features at a glance.Need more help? Contact us at support@403fin.io.
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