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 4.65.0

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
1.1M Ratings

1.1M 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!

Philosoviser ,

Two factor authentication? More like too fun authentication!

Whenever I try to log on to anything using my university ID, I’m first rerouted to DuoMobile on my phone. “My phone?”, I think. “I love that!” So it’s always great to have the opportunity to drop whatever academic task I’m doing and just, like, *lose myself* on a subreddit directed to tricking goats.

In addition, I really enjoy that feeling I get knowing that I’m secure from Chinese and Russian government agents so that I can confidently offer up my data to *American* companies. What’s that I’m feeling? Not just safety, but *patriotism*.

Frankly, two-factor authentication isn’t enough. Whenever I try to teach, I want to have to open my phone, open my laptop, turn on my Google glasses, run back to my office computer, call my wife to use her computer, and then beg my son to drop his iPad for long enough to verify me. Bring on six-factor authentication!!!

Bassoonista ,

Easy to use and effective for folks with brains

I don’t write reviews, but I felt compelled to do so here. I work in IT and since we adopted DUO, it has proven to be effective and easy to use for the vast majority of users. The one’s that have problems are generally the ones that don’t know how to operate their devices, or they take issue with our policies because they have poor personal information security. These are exactly the people that force companies to adopt stricter security in the first place.

I cannot speak to the complaints of folks who choose to use it for accounts that are not connected to a work or school environment, but if you get a new phone or lose or damage your phone, of course it locks you out of everything. That’s what it’s designed to do.

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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