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 3.47.0

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

2.9 out of 5
104 Ratings

104 Ratings

agathw ,

Was good until changed my phone

As other people here, I was happy until I had a new phone and wanted access to social media. Very user UNFRIENDLY guidance, my advice is to change the app before you start migrating data from your old phone. Unnecessary waste of time.

Filthy Yoghurt ,

Do not move to a new phone

The procedure of migrating to anew device is not clear and obtuse. Great idea for security but this needs a serious rethink for migration to new devices

Update for the developer;
To your point for a suggestion. The section where you have a radio button to turn on recovery with a new device with the password which you set. That doesn’t work. The instructions state that you need to perform a iCloud restore for this feature to work. If you have performed an iCloud restore but only activated this afterwards, then you need to perform a factory reset of your device and then restore again. If this is the case (though not documented) then this is not a satisfactory system. This would assume that duo is the primary function of the device and is the main concern of the user. So the suggestion; why not have a button ‘move duo to this device’, you are then prompted for the password and there you go.

Developer Response ,

Hi Filthy Yoghurt, thank you for taking the time to share your feedback with us. I will be happy to pass your comments along to our development team. If you have more specific suggestions of what you found difficult about the recovery process, feel free to send them our way.

🍍🍍🍍💄💄💄🍍 ,

Can't restore! Locked out of accounts

Last night I had my iPhone stolen which contained to codes I used to protect my socials. Unfortunately I am unable to get into my Instagram, Snapchat or Facebook because of this. I have tried to locate the backup codes but these were on my own phone. As Instagram is part of what I do for a living it's necessary for me to be using it. My previous phone was an iphone 11 & now I'm on an SE.

I tried using key chains to locate the old pass codes but as this phone I'm on only has 10gb of storage I am unable to update IOS to access this feature. I have also gotten in touch with Facebook & Instagram to look into this. SUCH A NIGHTMARE, please help me. I've contacted their email so hopefully this will be resolved.

App Privacy

The developer, Duo Security, has 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 based on, for example, the features you use or your age. Learn More


Duo Security, Inc.
32.1 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

    Up to six family members will be able to use this app with Family Sharing enabled.

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