Duo Mobile on iPhone

The Duo Mobile application makes it easy to authenticate — just tap “Approve” on the login request sent to your iPhone. You can also quickly generate login passcodes, even without an internet connection or cell service.

Find the latest version of Duo Mobile in the App Store.

Supported Platforms: The current version of Duo Mobile supports iOS 9.0 and greater. Older releases of iOS can install Duo Mobile version 3.16.7 from the App Store.

To see which version of Duo Mobile is installed on your device, go to the iOS Settings menu, then scroll down and tap Duo Mobile. The "System Info" section shows the app version.

Duo Push

Duo Push is the easiest and quickest way of authenticating. You'll get a login request sent to your phone — just press Approve to authenticate.

Duo Push Request on iOS

If you get a login request that you weren't expecting, press Deny to reject the request. You’ll be given the ability to report it as fraudulent, or you can tap It was a mistake to deny the request without reporting it.

Touch ID

Duo Mobile 3.7 and later for iOS also supports Touch ID for Duo Push-based logins as an additional layer of security to verify user identity. If you're using a Touch ID capable iOS device you'll see a Touch ID prompt each time you authenticate via Duo Mobile (if required by your administrator).

Duo Mobile TouchID Prompt

If you're not able to scan your fingerprint using the TouchID sensor you can also approve the Duo authentication request using the device's passcode (the same one you use on the iOS lock screen).

Duo Push and Notifications

You can respond to Duo Push requests from the iOS lock screen or banner notification starting with Duo Mobile version 3.8

Swipe left on the lock screen Duo Mobile notification to reveal "Deny" and "Approve" actions.

Duo Mobile Lock Screen Notification

Swipe down on the Duo Mobile banner notification received when your screen is unlocked to approve or deny the request.

Duo Mobile Banner Notification

If you missed the banner notification you can still approve the Duo request. Swipe left on the missed notification in the notification tray to approve or deny the authentication request.

Duo Mobile Notification Approval

Apple Watch

See our Apple Watch guide.


Just tap the key button to generate a passcode. This works anywhere, even in places where you don't have an internet connection or can't get cell service.

Passcode Generation in Duo Mobile

Adding Accounts to Duo Mobile

During the setup process you'll see a barcode to scan (it looks like this).

Tap "Add Account" (or the plus button in the upper right). Scan the barcode to add the account to Duo Mobile.

Duo Mobile Account Activation

Third-Party Accounts

Duo Mobile supports third-party TOTP accounts, like Google and Dropbox. Learn more »

Removing Accounts

Delete an account by tapping the Edit button in the upper left. Then tap the delete icon, tap "Delete", and confirm the deletion.

Pull to Refresh

Check for authentication requests by pulling the account list down. Duo Mobile automatically checks for authentication requests, but if you think you have missed a request, then tap the list of accounts and pull down to refresh.

Backup & Restore

Your Duo Mobile account information is backed up automatically when you enable iCloud Backup on your phone, and can be restored only on the same device. This iCloud backup can't be used as is to migrate your Duo accounts to a new phone. See Apple's guide to enabling iCloud backup for more information.

If your administrator enabled Duo Mobile's backup and restore functionality and you previously backed up your Duo Mobile accounts from the app to iCloud you can restore your accounts to Duo Mobile on a new iOS device via the guided recovery process. See the full Duo Restore guide here.