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Duo Mobile

Duo Mobile

Security made simple

2.3M ratings
3081 reviews
#18 in free Business
💼 Business
🔧 Utilities
Free

Details

Released
April 6, 2011
Updated
October 19, 2026

Features

Developer

Duo Security LLC
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Duo Mobile screenshot #1 for iPhone
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Duo Mobile screenshot #4 for iPhone
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About

Enhance login security with two-factor authentication. Generate passcodes or use one-tap push notifications for seamless access to your accounts. Manage authentication for multiple applications and web services.

✓Two-factor authentication
✓Passcode generation
✓Push notification authentication
✓One-tap login
✓Manage multiple accounts
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What users say about Duo Mobile

Reviews of Duo Mobile are mixed: the Business app is rated 4.9/5 from 2.3M App Store ratings. What users like most: simple and easy to use, provides an extra layer of security. Top complaints: unreliable notifications and push functionality, compatibility issues when changing devices. Summarized from real user reviews.

Positive things

  • 👍Simple and easy to use
  • 🔒Provides an extra layer of security
  • 🚀Quick and convenient authentication
  • 🔒Secure login experience
  • 👍Straightforward and user-friendly
  • 👍Easy to set up and use

Negative things

  • 🐛Unreliable notifications and push functionality
  • 🐛Compatibility issues when changing devices
  • 🐛Slow and frustrating authentication process
  • 🐛Confusing and non-intuitive user interface
  • 🐛Forced use of the app causing inconvenience
  • 🐛Inability to remove or deactivate the app
See all reviews

What's New in Duo Mobile

4.124.0

October 19, 2026

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.

More

Charts

Top Free

📊 18

Business

The app has maintained its position at 18 recently.

Last updated on October 31, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Do not try to improve

Works very well so do not be Microsoft and f…up a good thing.
Iikontakt

Great App

Very easy to set up and use. Makes everyday work life so much easier!
DVDuo for Verizon

Faulty iOS Version Warning

So this app generally gets the job done. It’s UI for code confirmation is awful (but the UI for confirmation codes the on host side is much worse).

The annoying part is the warnings about out of date iOS versions when you are on the latest available. This needs to be fixed!!!
RNrandom dink nickname

Don’t recommend if you switch phones

Accounts deactivated and unable to access after getting a new phone after my old phone was broken.
MMike-Miami93

Annoying frequent updates

Almost always when trying to log in, I must keep updating the app on my phone, which is almost every week now. That wasn’t the case previously. It is annoying and inconvenient to do so ALL the time.
Llexgrove
See 3076 more reviews

User experience

🐞

Reported Bugs

5 issues

Notifications not working as expected

Bug

App not recognizing new devices after replacement

Bug

Authentication process getting stuck or timing out

Bug

Inability to recover accounts after device changes

Bug

Unexpected language changes in the app

Bug
✨

Requested Features

5 requests

Allow more control and customization for users

Feature

Improve integration with other authentication methods

Feature

Provide better support and guidance for new users

Feature

Add an option to remember trusted devices

Feature

Streamline the authentication flow for faster access

Feature

FAQ

What does Duo Mobile do?

Duo Mobile enhances login security by providing two-factor authentication. It generates passcodes and allows for one-tap authentication via push notifications to secure your accounts.

How does Duo Mobile work?

The application works with Duo Security's service to offer secure logins. You can generate passcodes directly within the app or approve login requests with a simple tap on a push notification.

Is Duo Mobile free to use?

Based on the provided information, the application is free to use. There are no mentions of subscription fees or in-app purchases for its core functionality.

What devices is Duo Mobile compatible with?

Duo Mobile is compatible with iPhone, iPad, and Apple Watch devices, allowing for flexible and convenient authentication across your Apple ecosystem.

Can I use Duo Mobile for more than one account?

Yes, Duo Mobile allows you to manage two-factor authentication for multiple applications and web services. You can add third-party accounts at any time to secure them.