86.9K reviews
Content rating
PEGI 3
50M+
Downloads
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About this app

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.

Additionally, you can use Duo Mobile to manage two-factor authentication for other application and web services that make use of passcodes.

Duo Mobile also has a companion app for Wear OS, Duo Wear, making secure authentication even more convenient on your smartwatch.

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.

Additionally, we will request access to use your camera for the sole purpose of scanning QR codes when activating accounts. Accounts can be activated by other methods if you choose not to do so.

License agreements for third-party Open Source libraries used in Duo Mobile can be found at https://www.duosecurity.com/legal/open-source-licenses.

For the latest Terms and Conditions see https://duo.com/legal/terms.
Security made simple
Updated on
Oct 19, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    App activity, App info and performance, and Device or other IDs
  • Data is encrypted in transit
  • Data can’t be deleted

Ratings and reviews

85.3K reviews
callum eldridge
July 14, 2022
I'm extremely frustrated by the fact that this app doesn't work with older phones. I do not think it is particularly reasonable for my institution to require you to have the lastest phone in order to even use their IT, but they do! My phone isn't even that old but just isn't supported, and options like verification by text are no longer available. Thanks Duo.
170 people found this review helpful
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Balreuse Baker
October 22, 2021
Avoid! ⚠️ User of 4 years+. More than half my accounts failed to generate any passcode. I reach out to support, their solution was for me contact all those individual sites to help fix the issue. I'm shocked. It's one thing if only 1 site was faulty, but the majority of my accounts are giving error. Reverted to an old build from backup, accounts can generate passcodes but they are invalid. The duo update broke my account. I'm utterly annoyed.
36 people found this review helpful
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Giselle G
September 16, 2026
I got a new phone and its not allowing me to reconnect my old accounts for whatever reason. I went too settings and scanned the new QR code but it kept telling me it was invalid. I tried logging in through my account via email and same thing.
13 people found this review helpful
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What’s new

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.