Best Duo Two Factor Apps

232+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated July 2026

Duo Mobile is the household name in duo two factor, but it's far from the only option. We track 232+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Duo Two Factor Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Duo MobileDuo MobileFree4.9★ (2.2M)NoNoJul 2026
22FA Authenticator: MFA RSA2FA Authenticator: MFA RSAFree4.6★ (25)YesYesJul 2026
3Two Factor Authenticator & OTPTwo Factor Authenticator & OTPFree4.5★ (133)NoYesJul 2026
4Multi Authenticator: OTP, MFAMulti Authenticator: OTP, MFAFree4.7★ (34)NoYesJul 2026
52FAuthify - Authenticator app2FAuthify - Authenticator appFree4.2★ (43)NoYesJul 2026
6Authenticator: Secure 2FA AuthAuthenticator: Secure 2FA AuthFree3.7★ (3)YesYesJul 2026
7Authenticator: Secure 2FA, MFAAuthenticator: Secure 2FA, MFAFree4.6★ (61)NoYesMay 2026
8Authenticator App ™Authenticator App ™Free4.4★ (21K)NoYesJul 2026

Top Picks for Duo Two Factor

Duo Mobile#1

Duo Mobile by Duo Security LLC

간소화된 보안
Editor's Choice
💼 Business
4.9😐(2.2M ratings)
Free
#17in Business
Duo Mobile screenshot 1
Duo Mobile screenshot 2
Duo Mobile screenshot 3
Duo Mobile screenshot 4

Enhance login security with two-factor authentication. Generate passcodes or use one-tap push notifications for seamless access to your accounts. Manage authentication for multiple applications and web services.

What We Love

  • 👍 Simple and easy to use
  • 🔒 Provides an extra layer of security
  • 🚀 Quick and convenient authentication
  • 🔒 Secure login experience

Room to Improve

  • 🐛 Unreliable notifications and push functionality
  • 🐛 Compatibility issues when changing devices
  • 🐛 Slow and frustrating authentication process
2FA Authenticator: MFA RSA#2

2FA Authenticator: MFA RSA by SERAPHINA VINER

Verification & Authentication
Strong Contender
🔧 Utilities
4.6(25 ratings)
FreeAdsIn-App Purchases
2FA Authenticator: MFA RSA screenshot 1
2FA Authenticator: MFA RSA screenshot 2
2FA Authenticator: MFA RSA screenshot 3
2FA Authenticator: MFA RSA screenshot 4
2FA Authenticator: MFA RSA screenshot 5

Enhance your digital security with a robust two-factor authentication solution. Protect sensitive data from unauthorized access with end-to-end encryption and unlimited account management. Sync securely with iCloud for easy access and peace of mind.

Two Factor Authenticator & OTP#3

Two Factor Authenticator & OTP by HENRY FOSTER

Simple 2FA authentication app
Worth Considering
🔧 Utilities
4.5(133 ratings)
FreeIn-App Purchases
Two Factor Authenticator & OTP screenshot 1
Two Factor Authenticator & OTP screenshot 2
Two Factor Authenticator & OTP screenshot 3
Two Factor Authenticator & OTP screenshot 4
Two Factor Authenticator & OTP screenshot 5

Enhance your online security with robust two-factor and multi-factor authentication. This app generates secure one-time passwords and supports multiple protocols, with features like backup, restore, and encrypted data storage for peace of mind.

More Duo Two Factor apps to explore

4
Multi Authenticator: OTP, MFA
Multi Authenticator: OTP, MFA
Multi Authenticator: OTP, MFA
Mobile 2FA for your Security
Free

This app provides secure storage and management of two-factor authentication codes directly on your device. It offers end-to-end encryption for all data, including cloud backups, ensuring your online accounts are protected without needing an internet connection.

Secure 2FA code storageEnd-to-end encryptionEncrypted cloud backups
📰 Magazines & Newspapers
(34)
subscription
5
2FAuthify - Authenticator app
2FAuthify - Authenticator app
2FAuthify - Authenticator app
Two Factor Authenticator
Free

Secure your online accounts with a robust two-factor authentication app. Generate, store, and manage 2FA and MFA codes for numerous services, ensuring your digital life remains protected. Offers encrypted backups, cross-device sync, and offline code generation.

Strong encryption and privacyEncrypted cloud backupCross-device synchronization
📊 Productivity
(43)
free with in-app purchases
6
Authenticator: Secure 2FA Auth
Authenticator: Secure 2FA Auth
Authenticator: Secure 2FA Auth
2 Factor Authentication: MFA
Free

Securely manage your two-factor authentication tokens and passwords in one place. This app offers offline code generation and a private in-app browser. Free users can manage existing codes and passwords, while premium subscribers gain unlimited creation and secure browsing.

Organize 2FA tokens and passwordsOffline code generationBuilt-in secure browser
🔧 Utilities
(3)
free with in-app purchases
7
Authenticator: Secure 2FA, MFA
Authenticator: Secure 2FA, MFA
Authenticator: Secure 2FA, MFA
2 Step Verification Auth: TOTP
Free

This app provides two-factor authentication to secure your online accounts. It generates time-based one-time passwords for various services, offering features like cloud backup, biometric protection, and offline code generation. Protect your digital life with this reliable and user-friendly security solution.

Time-based one-time passwords (TOTP)Secure cloud backup and syncBiometric and PIN protection
🔧 Utilities
(61)
free with in-app purchases
8
Authenticator App ™
Authenticator App ™
Authenticator App ™
Two Factor Authentication
Free

This app provides a secure way to manage two-factor authentication (2FA) for your online accounts. It generates time-based one-time passwords (TOTP) that update every 30 seconds, offering an extra layer of security without needing an internet connection. Features include iCloud backup, cross-device synchronization, and biometric unlock.

Time-based one-time password (TOTP) generationSecure iCloud backup and encryptionSynchronization across all devices
🔧 Utilities
(21K)
free with in-app purchases
9
Two Factor Authenticator App
Two Factor Authenticator App
Two Factor Authenticator App
Simple 2FA Authentication
Free

Generate and store secure two-factor authentication codes for enhanced online account protection. Easily set up tokens via QR code scanning and access codes instantly with widgets and FaceID. Enjoy offline code generation and private browsing.

Secure 2FA code generationQR code setupSeamless device sync
🔧 Utilities
(58)
free with in-app purchases
10
MFA Authenticator: Secure 2FA
MFA Authenticator: Secure 2FA
MFA Authenticator: Secure 2FA
2 Factor Auth: OTP & Verify
Free

This app simplifies online security by enabling two-factor authentication for all your accounts in one place. It offers secure backups, biometric locks, and seamless device syncing for a private and user-friendly experience.

Two-factor authentication managementSecure token backupsPasscode and biometric app lock
🔧 Utilities
(29)
freemium
11
Authenticator App - 2FA Totp
Authenticator App - 2FA Totp
Authenticator App - 2FA Totp
MFA Authentication 2 Factor
Free

This app generates secure one-time passwords for your online accounts, offering an extra layer of protection for email, social media, banking, and work platforms. It supports TOTP and HOTP standards, allows easy account setup via QR code or manual entry, and ensures your data stays private and encrypted on your device.

TOTP & HOTP code generationQR code scanning for setupSecure on-device storage
🔧 Utilities
(24)
freemium
12
Authenticator ℠ App
Authenticator ℠ App
Authenticator ℠ App
2FA, Two Factor Authentication
Free

Secure your online accounts with standards-based two-factor authentication. This app generates time-based one-time passwords directly on your device, offering a reliable second step for sign-ins without relying on SMS codes. Protect personal and work accounts across various platforms.

Secure TOTP verification codesFast and easy account setupFull control over 2FA accounts
🔧 Utilities
(4.2K)
free with in-app purchases
13
Authenticator Duo: Two Factor
Authenticator Duo: Two Factor
Authenticator Duo: Two Factor
2Fa Authy, MFA Authentication
Free

Secure your online accounts with this app that generates and stores two-factor authentication codes. It offers end-to-end encryption, Face ID/Touch ID access, and encrypted iCloud backups for easy restoration across devices. Operate securely offline and import existing tokens.

Generate and store 2FA/MFA tokensScan QR codes or manually input codesEnd-to-end encryption for all codes
🔧 Utilities
(14)
subscription
14
Google Authenticator
Google Authenticator
Google Authenticator
by Google
Free

Enhance your online security with a second verification step for your accounts. Generate codes directly on your phone, even offline, to protect against unauthorized access. Sync codes across devices for easy access and manage multiple accounts securely.

Offline code generationSync codes across devicesAutomatic QR code setup
🔧 Utilities
(1.1M)
free
15
Guide for Google Duo
Guide for Google Duo
Guide for Google Duo
by Davit Mkrtchtan
Free

Learn how to use a popular video calling app with this comprehensive guide. It offers step-by-step tutorials with images to help you install, set up, and master video calls. Discover how to connect with your phone contacts easily.

Installation guideSetup instructionsMaking video calls
📚 Books
(29)
free
16
Authenticator App - Duo Factor
Authenticator App - Duo Factor
Authenticator App - Duo Factor
Two Step Verification Security
Free

Transform your living spaces with AI-powered interior design suggestions. Upload a photo of your room, choose a style, and see instant visual changes. Save and share your design ideas with ease.

Real-time room transformationEndless design inspirationDiverse style options
🔧 Utilities
(5)
free with in-app purchases
17
Authenticator App - Authkey
Authenticator App - Authkey
Authenticator App - Authkey
Two factor authentication, 2fa
Free

Enhance your online security with this app, offering a secure and reliable method to protect your accounts. It generates unique codes for two-factor authentication, ensuring your personal information stays safe.

Account protection with 2FAEasy setup and managementBackup and sync accounts
🔧 Utilities
(3.3K)
free with in-app purchases
18
2FA Authenticator (2FAS)
2FA Authenticator (2FAS)
2FA Authenticator (2FAS)
#1 Rated 2FA Authenticator
Free

Securely log in to your online accounts with two-factor authentication. This app protects your personal data and passwords from cyber threats with a simple, private, and open-source solution. It offers easy token restoration, app protection, and offline functionality.

Two-factor authenticationToken backup and restoreApp protection with passcode/biometrics
📊 Productivity
(34K)
free
19
2FA Authenticator • Auth App+
2FA Authenticator • Auth App+
2FA Authenticator • Auth App+
Secure & Fast Authentication
Free

Enhance your online account security with this tool that generates two-factor authentication (2FA) codes. It supports a wide range of services and offers effortless setup with a user-friendly interface. Secure your digital identity and gain peace of mind.

Generate two-factor authentication codesSupport for a wide range of servicesEffortless setup process
📊 Productivity
(95)
free with in-app purchases
20
Authenticator Duo - Two Factor
Authenticator Duo - Two Factor
Authenticator Duo - Two Factor
MFA Authentication & 2Fa Authy
Free

This app provides robust two-factor authentication to secure your online accounts. It offers easy setup, management, and backup/sync features using advanced security protocols for peace of mind.

Two-Factor Authentication (2FA)Easy Setup & ManagementBackup & Sync
🔧 Utilities
(7)
subscription

FAQ about Duo Two Factor

What are the best duo two factor apps for iPhone?
Duo Mobile tops our duo two factor apps ranking as of July 2026, with a 4.9-star average from 2.2M App Store ratings, and it's free to download.
Yes — 20 of the top duo two factor apps we rank are free to download, including Duo Mobile and 2FA Authenticator: MFA RSA.
Duo Mobile has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 232+ duo two factor apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Duo Mobile enhances login security by providing two-factor authentication. It generates passcodes and allows for one-tap authentication via push notifications to secure your accounts.
The application works with Duo Security's service to offer secure logins. You can generate passcodes directly within the app or approve login requests with a simple tap on a push notification.

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