Best Duo Two Factor Apps

246+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated August 2026

Duo Mobile is the household name in duo two factor, but it's far from the only option. We track 246+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Duo Two Factor Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Duo MobileDuo MobileFree4.9★ (2.2M)NoNoAug 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★ (45)NoYesAug 2026
5Authenticator: Secure 2FA, MFAAuthenticator: Secure 2FA, MFAFree4.6★ (61)NoYesJul 2026
6Authenticator: Secure 2FA AuthAuthenticator: Secure 2FA AuthFree3.7★ (3)YesYesJul 2026
7Authenticator Duo: Two FactorAuthenticator Duo: Two FactorFree5.0★ (14)NoYesMay 2026
82FAuthify - Authenticator app2FAuthify - Authenticator appFree4.2★ (43)NoYesAug 2026

Top Picks for Duo Two Factor

Duo Mobile#1

Duo Mobile by Duo Security LLC

Security made simple
Editor's Choice
💼 Business
4.9😐(2.2M ratings)
Free
#16in 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
(45)
subscription
5
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
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 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
8
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
9
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
10
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
11
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
12
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
13
Authenticator App 2FA, MFA
Authenticator App 2FA, MFA
Authenticator App 2FA, MFA
Two Factor Authentication 2fas
Free

Enhance your online security with this two-factor authentication app. It securely stores login credentials and generates time-based one-time passwords for account protection. Easily add accounts via QR code scanning or manual entry.

Secure account storageGenerate 2FA codesQR code scanning
🔧 Utilities
(2)
free with in-app purchases
14
Authenticator App - Two Factor
Authenticator App - Two Factor
Authenticator App - Two Factor
Two-factor - Duo Security
Free

Secure your online accounts with this simple and safe two-factor authentication app. It generates 6-digit one-time passwords to add an extra layer of security against hackers. Protect your accounts by scanning QR codes or manually entering tokens.

Secures online accountsGenerates 6-digit TOTP codesSupports QR code scanning
🔧 Utilities
(400)
free with in-app purchases
15
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
16
Authenticator: Password Keeper
Authenticator: Password Keeper
Authenticator: Password Keeper
Two-Factor & MFA Protection
Free

This app provides free two-factor and multi-factor authentication for your online accounts. It also offers a password manager with autofill, encrypted backups, and a built-in VPN for enhanced digital security.

Two-Factor Authentication (2FA)Password Manager with AutofillEncrypted Backups
🔧 Utilities
(6)
free with in-app purchases
17
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
18
Authenticator App - Duo Secure
Authenticator App - Duo Secure
Authenticator App - Duo Secure
2FA codes for favorite service
Free

Enhance digital security with a multi-factor authenticator app. It provides an extra layer of protection for sensitive accounts and information, working offline for reliable access. Protect email, social media, financial accounts, and more with this user-friendly solution.

Multi-factor authenticationOffline 2FA code generationWide service integration
💼 Business
(24)
free with in-app purchases
19
Authenticator - Two Factor App
Authenticator - Two Factor App
Authenticator - Two Factor App
MFA & 2FA Verify, Security
Free

This app generates time-based one-time passwords (OTP) to enhance the security of your online accounts. It offers quick setup via QR code scanning and works offline once configured. Data is encrypted and can be backed up to iCloud for seamless device synchronization.

Quick setup with QR code scanningRegularly updated OTPsOffline functionality
🔧 Utilities
(6)
subscription
20
Authenticator App - DuoShield
Authenticator App - DuoShield
Authenticator App - DuoShield
2FA Verify Password: TOTP, 2FA
Free

Secure your online accounts with this comprehensive two-factor authentication tool. It offers features like account organization, customizable icons, secure backups, and Face ID protection. Unlock advanced features like QR code scanning and manual 2FA entry with premium subscriptions.

Account creation and storageCustomizable account foldersPersonalized account icons
🔧 Utilities
(15)
free with in-app purchases

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 August 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 August 2026.
We track 246+ duo two factor apps on the iOS App Store as of August 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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