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 3.33.0

Support for upcoming improvements to the restore workflow for Duo-protected accounts.

Ratings and Reviews

2.5 out of 5
1.1K Ratings

1.1K Ratings

EllaG25 ,

Very Difficult

At first the app was going well for me, but then i got a new phone and the app didn’t transfer over so i had to redownload Duo but the thing was, the app wasn’t connected to my apps (Snapchat and Instagram) anymore but my apps still required the codes. So i tried going on Duo and clicking “Looking to recover your accounts?” at the bottom of the screen and it was frozen, as in you weren’t able to click it but everything else worked. So i looked up a solution on safari and nothing came up that would solve my problem except for Androids and i have an iPhone. So i’m currently permanently logged out of Instagram.

Developer Response ,

Hi EllaG25, It sounds like you may not have set up Duo Restore for Third-Party Accounts prior to getting your new device. You will have to contact support for Snapchat and Instagram to regain access to those accounts. In the future, we recommend using Duo Restore for Third-Party Accounts ( or generating and saving recovery codes for those accounts (for example, on Instagram: if you lose access to your 2FA device.

ASkylitDrivePwNz!!! ,

Yo these reviews are brutal

I haven’t actually used the app yet and I’m annoyed I have to, but speaking realistically, 2FA is just a way for school to keep everyone’s data safe. It’s a fairly aggressive answer in my opinion, but I’m sure it’ll be effective. That’s a whole other thing hackers would have to infiltrate. So I’ll deal with the inconvenience.

But MAN the reviews are harsh. Kudos on whoever’s job it is to respond as the developer to reviews, you’re definitely catching all of them. I gotta ask, is there like a script you follow for most sorts of responses or is every response organic? Because some of the responses seem clearly prepared and almost glib to a certain extent, but others (especially responses to unnecessarily critical reviews) tend to be eloquent, but thorough in response to the defense of the service. When I read it I’m thinking “Man this guy really wants to try easing peoples uncertainties with the product.” So kudos!

Developer Response ,

Hi ASkylitDrivePwNz!!!, thank you so much for your review and kind words! To answer your question, we do our best to respond to every review that we can, and each response is organic. For the ease of convenience, we do reuse some past answers to frequently asked questions, but we modify these to tailor them to the individual reviews as much as possible. We are passionate about providing a great experience for our users.

mnkjrdgyrgh ,

A great option for 2FA

Seeing all the low ratings based on a business’ or university’s decision to apply additional security to their networks, I had to add my two cents. It is 2FA, not Duo, about which most are railing. If you don’t like 2FA, rid the world of hackers and thieves that will use every available means to get into any network they can. Until you accomplish that, accept the fact that for those trying to secure a network, 2FA is a necessary precaution, much like a deadbolt on a door. And Duo is a good method for applying 2FA. We primarily use Duo Push for accessing our systems and it works very well.

Unrelated note: Duo works much better than this rating system, which will tell you after the fact that a nickname has been used but won’t suggest one that hasn’t been...

Developer Response ,

Thank you for your review!


Duo Security, Inc.
27.8 MB

Requires iOS 11.0 and watchOS 2.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German

Age Rating


  • Family Sharing

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

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