Duo Mobile 4+

Security made simple

Duo Security LLC

    • Free


Duo Mobile works with Duo Security's two-factor authentication service to make logins more secure. The application generates passcodes for login and can receive push notifications for easy, one-tap authentication on your iPhone, iPad, or Apple Watch.

Additionally, you can use Duo Mobile to manage two-factor authentication for other application and web services that make use of passcodes.

Note: For Duo accounts, Duo Mobile needs to be activated and linked to your account before it will work. You will receive an activation link as part of Duo's enrollment process. You may add third-party accounts at any time.

License agreements for third-party Open Source libraries used in Duo Mobile can be found at https://www.duosecurity.com/legal/open-source-licenses.

What’s New

Version 4.30.0

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.

Ratings and Reviews

1.9 out of 5
9.5K Ratings

9.5K Ratings

NitNicked in LA ,

You broke my notifications!

Works ok but recent update broke sound notifications: I get only banner abd no sound or vibration. This is with two different organizations’ push notifications on up to date iPhone 12mini on iOS 14.2. Other apps with notifications like this (Okta) are fine. DUO tells me to complain to my administrators instead of taking feedback directly. Taking no responsibility for user experience is another two stars off.

2022: Dropped it to one star after several years of good service because latest update broke the push notification and touch the little check in the green circle to authenticate. Sometimes I hear a sound, sometimes I do not. Sometimes I see something that I can touch to take me to the duo app from my lock screen, sometimes I cannot. When I am in, The app, I see the notification for an authentication request, and sometimes I don’t. Before I clicked update yet again today in the App Store, I was able to click on the green circle with a checkmark to confirm my authentication and desire to login, but today, after all the problems, I clicked update again in the App Store, and now the little green circle does not work. My phone works, my screen works, my phone works, but Duo doesn’t. Major fail. And I can’t get through to IT support. Because I’m sure dozens of other users are same complaint because it is the APP that is broken.


Don’t understand people problem with app

I normally don’t leave reviews and comments but with all the negative reviews on this app I thought I should share my positive experience with Duo.
I recently upgraded my phone and I totally forgot to log out of dúo. Wasn’t until a Monday did I realize oh crap I forgot to log out and with all the negative reviews and problems people had, I got nervous. However, when I called my schools IT dept they walked me through how to reactivate Duo on my new phone. It took less than 5 minutes to transfer Duo from my old phone to my new phone using the QR scan, I confirm a couple of things and voila I was back in business. So I don’t know what problems people are stressing about. Perhaps it’s the people’s individual company or institutions’ IT dept that is failing them. Duo is user friendly and easy to use. You don’t need to call anyone. Just log on to your site as normal when duo is prompted look to the left and you’ll see some writing read the small writing you have options and go from there. It’s not hard. It will suggest the QR scan, I have to say it was confusing how to find the QR scan. But clicking on blue underlines I found it, and it popped up

Lphilliieswc08 ,

Endless Cycle of frustration

The Duo Mobile app is realistically one of the largest stressors I have experienced in my life. Upon getting a new phone I was unable to access any of my school work/grades/tax information for months. If you need to get a new device it requires that you verify the new device with your old device, but for many people when a new device is purchased they no longer have access to their old device. Their “help” support staff is among one of the worst of its kind (which is saying something). It took me approximately 6 hours to recover my accounts.

Moving on to normally logging in the process is arduous and frankly broken. I have no way to remove my old phone number as the primary verification. There is a “click to accept” box to remain logged in for 24 hours on the login page, although you must be verified to click the box, and upon verification you are immediately redirected away from the page. The system is inherently broken. Yes calling may be faster than scrolling through all your texts looking for old verification codes, but I should NOT have to receive a phone call or spend minutes searching my texts simply to do economics homework.

If you are an administrator considering using this app, please find some other service. Using duo mobile will cause your employees/students immense stress and disdain against your organization.

App Privacy

The developer, Duo Security LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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