Duo Mobile

Duo Mobile is a secure authentication app designed to protect company and personal data through two-factor authentication (2FA) and multi-factor authentication (MFA). Working seamlessly with Duo Security’s authentication service, the app adds an essential layer of security to account logins. Duo Mobile enables secure access from a smartphone by generating passcodes or sending push notifications for fast, reliable identity verification. 

Easy One-Tap Authentication

Duo Mobile supports Duo Push, a secure and user-friendly authentication method that allows access with a single tap. Push notifications are sent instantly during login attempts, enabling quick approval or denial. This streamlined process improves security without slowing down access to applications and systems.

Time-Based One-Time Passcodes (TOTP)

For environments where push notifications are unavailable, Duo Mobile generates time-based one-time passcodes. These passcodes can be entered during login to complete the authentication process, ensuring secure access even when offline or without network connectivity.

Protection Against Unauthorized Access

Duo Mobile helps identify and prevent malicious login attempts. When an unexpected authentication request is received, the app displays additional details such as the geographic location of the attempt. This visibility allows suspicious activity to be recognized immediately and reported to administrators, helping protect sensitive data from unauthorized access.

Support for Multiple Accounts and Services

In addition to Duo accounts, Duo Mobile can store and manage passcodes for third-party applications and web services that use two-factor authentication. Accounts can be added at any time, making the app a centralized solution for secure access across multiple platforms.

Simple and Secure Account Activation

Duo Mobile requires activation and linking to a Duo account before use. Activation is completed through an enrollment process that includes an activation link. For convenience, the app may request camera access solely for scanning QR codes during setup, with alternative activation methods available if camera access is declined.

Wear OS Integration

With the Duo Wear companion app, authentication requests can be approved directly from a smartwatch. This integration provides faster access and added convenience while maintaining the same high level of security.

FAQs

1. What is Duo Mobile used for?

Duo Mobile is an authentication app that provides two-factor and multi-factor authentication to secure logins for Duo-protected and third-party services.

2. How does Duo Push authentication work?

Duo Push sends a secure notification to the app during login, allowing the request to be approved or denied with a single tap.

3. Can Duo Mobile generate passcodes without an internet connection?

Yes, Duo Mobile generates time-based one-time passcodes that can be used offline to complete authentication.

4. How does Duo Mobile help detect suspicious login attempts?

Unexpected authentication requests include details such as login location, making it easier to identify and report malicious activity.

5. Is Duo Mobile required to be activated before use?

Yes, Duo Mobile must be activated and linked to a Duo account through the enrollment process before it can be used.

Version History

v4.91.1—8 Jul, 2025

We're always working to improve user experience in Duo Mobile. This update introduces various behind-the-scenes improvements and minor bug fixes to enhance your authentication experience.

v4.90.0—4 Jun, 2025

We're always working to improve user experience in Duo Mobile. This update introduces various behind-the-scenes improvements and minor bug fixes to enhance your authentication experience.

v4.89.0—22 May, 2025

We're always working to improve user experience in Duo Mobile. This update introduces various behind-the-scenes improvements and minor bug fixes to enhance your authentication experience.