---
title: "Using a Two-Factor Authentication App"
source_url: https://docs.rapyd.net/en/using-a-two-factor-authentication-app.html
lang: en
---

# Using a Two-Factor Authentication App

Set up your authentication app to use for your MFA authentication preference.

You can configure two-factor authentication using a mobile app or via text message. To follow how to configure a text message, refer to [Changing Your MFA Preference](https://docs.rapyd.net/en/changing-your-mfa-preference.md "Changing Your MFA Preference"). When using an authentication app preference, you can set up a TOTP (Time-based One Time Password) application to configure 2FA. TOTP applications can be more reliable to connect outside of your SMS network.

TOTP applications automatically generate a 6-digit code that changes after a given amount of time. A few preferred TOTP applications are:

- [Google Authenticator](https://support.google.com/accounts/answer/1066447?hl=en&co=GENIE.Platform%3DAndroid&oco=0)
- [2FAS Auth](https://2fas.com/)
- [LastPass Authenticator](https://lastpass.com/auth/)
- [Microsoft Authenticator](https://www.microsoft.com/en-us/account/authenticator/)

To configure authentication via TOTP during sign up, follow the steps below to configure your 2FA settings.

1. Download a TOTP app.
2. During the sign-up process, select the **Use authenticator app** link.

   ![6480887c6a361.png](image/img-b8c6f4a4813f210bb64c92d5c3e4e0bd.png)
3. On the Authenticator App page, open your authenticator app and select the appropriate icon to scan the QR code.

   ![64808880a587a.png](image/img-3a7541714bda873e60e0f398f83c1951.png)
4. Your mobile device’s camera should turn on to scan the QR code on the Authenticator App page. After scanning, the mobile-app should display a 6-digit code you can enter on the Authenticator App page.
5. Enter the One Time Password (OTP).
6. Select **Verify my number**.
7. Complete the account sign up process and log into your Client Portal account.