Best Duo 2Fa Apps

233+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated June 2026

Duo Mobile is the household name in duo 2fa, but it's far from the only option. We track 233+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Duo 2Fa Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Duo MobileDuo MobileFree4.9★ (2.2M)NoNoJul 2026
22FA Authenticator • Auth App+2FA Authenticator • Auth App+Free4.5★ (95)YesYesJul 2026
32FA Authenticator - Auth App2FA Authenticator - Auth AppFree4.6★ (59)NoYesJun 2026
4Authenticator App ™Authenticator App ™Free4.4★ (21K)NoYesJul 2026
5Authenticator App+Authenticator App+Free4.8★ (12K)YesYesJul 2026
6Google AuthenticatorGoogle AuthenticatorFree4.9★ (1.1M)NoNoJul 2026
72FA Authenticator (2FAS)2FA Authenticator (2FAS)Free4.7★ (34K)NoNoJul 2026
8Authenticator app - 2FA, MFAAuthenticator app - 2FA, MFAFree4.6★ (5.7K)NoYesJul 2026

Top Picks for Duo 2Fa

Duo Mobile#1

Duo Mobile by Duo Security LLC

간소화된 보안
Editor's Choice
💼 Business
4.9😐(2.2M ratings)
Free
#14in 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 • Auth App+#2

2FA Authenticator • Auth App+ by APPSTER LIMITED

Secure & Fast Authentication
Strong Contender
📊 Productivity
4.5(95 ratings)
FreeAdsIn-App Purchases
2FA Authenticator • Auth App+ screenshot 1
2FA Authenticator • Auth App+ screenshot 2
2FA Authenticator • Auth App+ screenshot 3
2FA Authenticator • Auth App+ screenshot 4
2FA Authenticator • Auth App+ screenshot 5
2FA Authenticator • Auth App+ screenshot 6

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.

2FA Authenticator - Auth App#3

2FA Authenticator - Auth App by Alina Kubiak

Two-Factor Authentication
Worth Considering
🔧 Utilities
4.6(59 ratings)
FreeIn-App Purchases
2FA Authenticator - Auth App screenshot 1
2FA Authenticator - Auth App screenshot 2
2FA Authenticator - Auth App screenshot 3
2FA Authenticator - Auth App screenshot 4
2FA Authenticator - Auth App screenshot 5
2FA Authenticator - Auth App screenshot 6

Secure your online accounts with this fast and reliable two-factor authentication app. Easily add accounts via QR code or manual setup to protect your logins from unauthorized access. Offers sync and backup options for added safety.

More Duo 2Fa apps to explore

4
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
5
Authenticator App+
Authenticator App+
Authenticator App+
2FA Two Factor Authentication
Free

Secure your online accounts with this app. It generates and stores two-factor authentication codes for popular services. Features include QR code scanning, end-to-end encryption, and device syncing.

Generate and store 2FA/MFA codesScan QR codes or enter manuallyEnd-to-end encryption
📊 Productivity
(12K)
subscription
6
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
7
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
8
Authenticator app - 2FA, MFA
Authenticator app - 2FA, MFA
Authenticator app - 2FA, MFA
Two Factor Authentication, OTP
Free

This app provides secure two-factor authentication for over 1000 popular online accounts. It offers quick access via widgets and Apple Watch, and ensures your data is safe with no internet exchange. Easily set up accounts by scanning QR codes or entering secret keys.

Two-factor authentication (2FA)Multi-factor authentication (MFA)Supports 1000+ apps
🔧 Utilities
(5.7K)
free with in-app purchases
9
Authenticator ·
Authenticator ·
Authenticator ·
2FA, Two Factor Authentication
Free

Securely store and generate two-factor authentication (2FA) tokens for your online accounts. Protect your accounts from hackers with an additional layer of security. Features encrypted backups, cross-device synchronization, and a private browser.

Secure 2FA token generationEncrypted iCloud backupsCross-device synchronization
🔧 Utilities
(26K)
free with in-app purchases
10
Authenticator: Secure 2FA App
Authenticator: Secure 2FA App
Authenticator: Secure 2FA App
MFA, TOTP Password Auth - 2FAs
Free

This app provides robust two-factor authentication to secure your online accounts. It offers features like account organization, secure password storage, and cross-device synchronization for enhanced digital identity protection.

Two-factor authentication (2FA)Account creation via QR code or manual entryAccount organization with folders
🔧 Utilities
(30)
free with in-app purchases
11
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
12
Authenticator App
Authenticator App
Authenticator App
2FA Authentication MFA & OTP
Free

This app provides secure two-factor authentication codes for your online accounts, enhancing security with encryption and backups. It offers seamless synchronization across Apple devices and quick access via widgets, even when offline.

Secure & Private EncryptionEncrypted BackupAutomatic Synchronization
📊 Productivity
(48K)
subscription
13
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
14
Authenticator ℠ App
Authenticator ℠ App
Authenticator ℠ App
Authentication App: 2FA, MFA
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
(4.3K)
free with in-app purchases
15
Authenticator App ·
Authenticator App ·
Authenticator App ·
Two Factor Authentication, 2FA
Free

This app generates and securely stores two-factor authentication codes for your online accounts. It offers robust protection with encrypted data, seamless device synchronization, and quick access via widgets and Apple Watch. Enjoy offline code generation and a private browser for enhanced security.

Generate 2FA codesSecurely store codesDevice synchronization
📊 Productivity
(80)
free with in-app purchases
16
Authenticator App - 2FA Auth +
Authenticator App - 2FA Auth +
Authenticator App - 2FA Auth +
OTP Two Factor for ID Verify
Free

This app provides secure two-factor authentication (2FA) codes for thousands of online accounts. It also offers a password manager with autofill, encrypted backups, and cross-device sync for enhanced digital security.

Two-Factor Authentication (2FA) codesPassword Manager with AutofillEncrypted Backups
📊 Productivity
(1.7K)
free with in-app purchases
17
Microsoft Authenticator
Microsoft Authenticator
Microsoft Authenticator
Protects your online identity
Free

Securely sign into online accounts with multi-factor authentication, passwordless login, or password autofill. Manage multiple accounts, including non-Microsoft services, and access Microsoft products and services seamlessly.

Multi-factor authentication (MFA)Passwordless sign-inPassword autofill
📊 Productivity
(672K)
free
18
Duo Auty 2FA - Secure Pass
Duo Auty 2FA - Secure Pass
Duo Auty 2FA - Secure Pass
Verify codes for access
Free

Enhance your online security with this two-factor authentication app. It supports time-based one-time passwords (TOTP) and PUSH authentication for seamless and secure access to your accounts. Add multiple accounts, customize with brand icons, and unlock with biometrics.

Two-factor authentication (2FA)TOTP and PUSH authenticationQR code scanning and import
🔧 Utilities
(2)
subscription
19
Authenticator App • 2FA • MFA
Authenticator App • 2FA • MFA
Authenticator App • 2FA • MFA
Secure Passwords with 2FA, MFA
Free

Secure your online accounts with two-factor and multi-factor authentication. Generates time-based one-time passwords (TOTP) and OTP codes for fast, reliable logins. Includes a built-in password manager and encrypted backup for all your credentials.

Two-factor authentication (2FA)Multi-factor authentication (MFA)Time-based one-time passwords (TOTP)
🔧 Utilities
(880)
free with in-app purchases
20
Authenticator App - 2FA
Authenticator App - 2FA
Authenticator App - 2FA
2fa, Two Factor Authentication
Free

This app generates secure two-factor authentication codes for your online accounts. It adds an extra layer of security to prevent unauthorized access and offers cloud backup for your authentication keys. Easily add accounts by scanning QR codes or manual entry.

Secure accounts with 2FAGenerate time-based one-time passwords (TOTP)Encrypted cloud backup and sync
📊 Productivity
(543)
freemium

FAQ about Duo 2Fa

What are the best duo 2fa apps for iPhone?
Duo Mobile tops our duo 2fa apps ranking as of June 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 2fa apps we rank are free to download, including Duo Mobile and 2FA Authenticator • Auth App+.
Duo Mobile has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 233+ duo 2fa apps on the iOS App Store as of June 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.