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 3.24.1

- Miscellaneous bug fixes for increased stability.

Previously, in 3.24
At Duo we care about transparency and providing you control over your data. This update collects usage data that will help us understand how you use Duo Mobile. We utilize this usage data to improve app reliability and to develop new features. You can opt out of this on the settings page at any time.

Ratings and Reviews

2.6 out of 5
273 Ratings
273 Ratings
Redfox52 ,

A Message for Schools and Universities

This is absolutely terrible. Chances are for those using or downloading this app solely for university use is pretty high, so this is directed at the universities that require this abysmal system.
This app is worthless. A password is already a system invented to prevent others from entering your account without your consent. Now, I have to boot up my account on a computer, type out everything, open my phone, open the app, wait for that to load, and get a random number, just to log into my account. This might not seem like much, but it does eat up time, and it begins to add up when I can’t even allow Chrome to remember my password because it changes EVERY TIME.
Maybe I wouldn’t be so annoyed with the system if it’d save my system onto Chrome with a ‘remember password’ feature, but until then I have to get through the different passcodes on my phone and laptop just to log onto a system for my academics. I’m not sure the Duo team can help their system right now, so this goes out to the universities that use this system: STOP.

Developer Response ,

We're sorry for your frustration. It sounds like you are typing your 2FA code everytime, unless your organization's settings have blocked it, you should be able to approve login requests via push notification. Learn more about Duo push notifications:

1357325898182 ,

Works exactly as it should and I hate it.

Yea, this app is pretty flawless, works as advertised and isn’t buggy. But dear god is it annoying. I can’t tell you the amount of times I’ve tried to log onto an account without my phone and was left there hopeless. This app might be good if you are trying to protect some HIGHLY CONFIDENTIAL info or if your intensely into your privacy, but for platforms such as social media and education portals a password would work just fine.

Now since my university requires use of Duo I am stuck with it, so I hope to see user improvements. Such as an ability to bypass the dual authentication on your phone through a chrome extension plug-in or something of the sort.

Duo, I hope to be able to change my 1 star rating because as of right now, I really do not like this platform.

joeyclyde ,

Lol it all the entitled students who know nothing

This app works perfect for what it is made for. It’s literally to increase security on your account. It’s supposed to take a few seconds more to login but it prevents anyone from accessing your account without also having your phone. I bet it was implemented because the IT depart was already having issues with users having their account maliciously accessed. Sorry to the devs who’s hard work gets bashed by people not smart enough to understand basic security.

Developer Response ,

Thanks for the review! We hope you continue to have a good experience with our app.


Duo Security, Inc.
30.8 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, German
Age Rating
Rated 4+
© Duo Security, Inc.


  • Family Sharing

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

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