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

What’s New

Version 3.53.0

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

2.3 out of 5
4K Ratings

4K Ratings

Angry-Johnnie ,

Interface, interface

As far as working as a 2fac this app is fine, it does that. The issue with it is that it’s a really simple app but has an annoying interface. If the buttons for the push notification could be moved to a more thumb friendly location that would be great. It’s just a screen with 2 buttons, there’s no reason to make me adjust my grip on the phone so I can reach the accept button. I should be able to pick the phone up and hit the button in one motion. Not pick the phone up fumble with the position in my hand then hit the button. It’s annoying and unnecessary. The whole screen is there to use for this purpose and is empty. The buttons are large but the phone screen is also large and it puts the buttons out of comfortable reach for one hand use. Stack them in the middle or something. Maybe a flick gesture, or both, I dunno.

Developer Response ,

Thanks for your feedback, Johnnie. I'll share your comments with our developers. You might find it easier to approve a push from the lockscreen, as seen in this article: Please give that a try in the meantime and see if it helps

Lcu76523443 ,

Fix it duo

Let me tell you a story.... in 2017, I went to a uni that required duo. The concept was great! Mind you, the uni was the administrative account and we the students were the users on the account. I added all my social media apps to this duo account. Fast forward to 2021, I haven’t been affiliated with the school in 3 years and they delete your email and account after one year. I finally bought a new phone, yes I had the same phone for years. I turned in my old phone to att & upgraded. I was updating all my social media apps on the new phone when I realized I couldn’t get into my duo app because it was a new phone. I tried to reset pws on the duo website and it said I wasn’t authorized due to my old uni being the administrator. I contacted the uni and they couldn’t send me a push because I didn’t have an account or even exist to them anymore! When I say ALL, ALL my memories are on my social media apps.... I was going to lose everything on there forever. Reaching out to the social media support desks are a waste of time, trust me I tried. The ONLY thing that saved me was going back to the att store and begging them to let me have my old phone back to back it up and unlink all my account from the duo app before backing up my new phone. Att is my savior for not sending out my old phone within 24 hours. Duo, I CAN’T be the only one with this story. DO BETTER!!!!!!!!!!!!!!

QueenBee2121212121 ,

Got a new phone, now I can't log onto my university account

This is the worst app I've ever used. Absolutely unnecessary and difficult. I've put up with it until now, but I can no longer sit silent. I recently got a new phone and in oder to reconnect duo to my university I need to log into my university account. But in order to log into my university account I need to verify it through duo. So obviously through this very dumb circle I can no longer log into my university account on my phone. Duo does offer verification though my old phone, but guess what? I no longer have that phone so it is absolutely impossible for me to verify my account through my old phone. I sincerely hope my university stops using this app as this is the worst experience I've ever had. All I want to do is be able to check my grades on my phone and I'll never be able to do that. And soon my 120 day access will run out on my labtop and I will no longer be able to access my school account which contains my grades, classroom, assignments, and more as I cannot verify my university account through duo. Making it virtually impossible to have access to my school account all because I got a new phone. This is the WORST app and experience I've ever had.

App Privacy

The developer, Duo Security, 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


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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