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 3.20.4

- Temporarily disable sending usage statistics data.

Ratings and Reviews

3.6 out of 5

302 Ratings

302 Ratings

Good, albeit a bit flaky


The two-factor security approach works well. Initial setup can drive one a bit batty with its convoluted complexity (it isn’t the most intuitive process, but two-factor services rarely are). Once you get through set up, it works.

As for Apple Watch and Duo, eh, that’s a miss. It hasn’t really worked well or reliably for some time. Hit or miss communication between the watch and phone, and the latest update pretty much squashed Apple Watch reliability. It’ll get fixed (Duo is good about that), but the fix will be undone at the next iOS or Duo Mobile update after that. It may be time for a rethink as to how an Apple Watch fits into the two-factor Duo ecosystem because as it stands, the push model of phone-to-watch seems very fragile.

What happened?


After the latest IOS update, I no longer get any notifications on my iWatch from Duo. That was one of the most convenient things about the watch. At work, I could store my phone away in a locked drawer and still use Duo on the watch for the required two-factor authorizations to log into my work account.

UPDATE: The latest IOS update earlier this week fixed the problem. I can love the app again. And the developer responded quickly with some advice (which I had already tried, but they didn’t know that). Impressed!

Developer Response

Hi Rankincats,
Sorry to hear you're having issues with Apple Watch. We have not made any changes to the app regarding watch notifications, but you may need to restore your notification settings.

Please try the following:
Open the Watch app on your phone, tap "My Watch," and scroll down. Then tap the entry for Duo Mobile. Enable "Show App on Apple Watch."

Awesome App and Awesome 2FA


This app is great. The fact that I can use the touchID to login is fantastic. I use it for personal and business. I would like to see more support for more platforms, big one push notification for google.

A lot of the problems with duo have been around configuration issues on the proxy side and not the app itself.

I would highly recommend this 2FA for any company and supported applications. 2FA saved my credit and my life from being hacked and this is company is easy to use.


Duo Security, Inc.
25.8 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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