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Duo Mobile app for iPhone and iPad

4.6 ( 7696 ratings )
Business Utilities
Developer: Duo Security
Current version: 3.20.4, last update: 7 months ago
First release : 08 Mar 2011
App size: 24.56 Mb

Duo Mobile works with Duo Securitys 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 Duos 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

Pros and cons of Duo Mobile app for iPhone and iPad

Duo Mobile app good for

Linked to the duo security software on your server, you can ensure that nobody can log on as you without confirming the request via this app. An excellent, simple approach to two factor authentication compatible with a wide array of popular online tools and UNIX systems.
The app works great; we use it productively to secure our remote management of about 1000 customer servers. The UI has still some room for improvement though: - when Im in the app and a new request comes in, I dont want to tap on "View" in a popup first. The request should open immediately. - when Im getting multiple requests at the same time, accepting them becomes very cumbersome because of the above mentioned popup.
Great app great service. It would just be nice if you could set a custom icon for each integration or service.
Great update with swipe to accept and the options on notifications!
I have no real experience using other apps of this nature but it works flawlessly.
Immediately crashes after launch (iOS 6.3 iPhone 3GS). It worked perfectly couple month before. Please fix it somehow!

Some bad moments

One of the least friendly apps I have ever seen. I deleted it shortly after it was installed.
After updating to Version 3.8.0 the app stopped working on my IPhone 4 OS 6.1 Please fix
Latest update crashes everytime on launch on my iPod3 Can no longer use this app.
Why do I have to instal another crappy app to log in? Why cant I just get a text message with the 2FA code? Google does it. Apple does it. Are you guys too cool for this or something? :(
App starts up and then quits immediately. It is completely unusable now.
I loved that my new Apple Watch would generate my duo code. Unfortunately when I updated the app, my watch app no longer works. Bummer

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