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 4.41.0

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

4.9 out of 5
435.6K Ratings

435.6K Ratings

The Chossen Warrior Joshua ,

Duo Secure Login

I thought it would end up being another cumbersome addition to accessing our work network but, it is actually very seamless once it is set up. I actually like it way better than many I have to use because it not a situation where I have to receive a text and then type it in on the computer. Simply login the way you normally do and your Duo app will just ask if you want to give permission and it literally gives you two boxes like in those letters kids would write to someone they like asking if they wanted to go steady and at the bottom would be two boxes and they would say check yes or no! It pops up automatically so no need to open the app first. It is actually that easy, way more easy than working up the courage to write a love letter asking someone to be you boyfriend or girlfriend much less giving it too them and going’s crazy waiting for it to be returned with the right box checked!

MaxBrownDog ,

Useful App

I first found out about the app when it was required by my company. Since then have added it for personal applications that allow two factor authorization (2FA) via an app as it is more secure than using text messages for 2FA.

In all due respect (and I mean that) it seems a number of the complaints about the app are really a result of company policies requiring multiple log-ins or not allowing users to stay logged in when inactive for a period of time, requiring another log-in. That’s not the fault of the 2FA app.

Not saying this app is perfect and I haven’t used other similar apps so I cannot compare. But for my purposes it has worked well.

Capital_Gainz ,

Duo mobile works

While the other 3 dual authentication apps on my phone work sometimes, DUO is the only one who has yet to let me down more than a few dozen times since passwords became an insecure means of data protection. Definitely beats email or sms verification. I miss the days where it was just a matter of finding the guy with the key to the filing cabinet you needed to get into. That was me… the keeper of keys. That role kept me employed for years but now big tech comes along and starts automating the jobs of hard working Americans just trying to provide for their families. It’s a shame what this generation has done to this country…

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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