Best Duo Multifactor Apps

82+ iOS apps curated and reviewed

4.3 avg rating
19 free apps
Updated May 2026

Looking for free duo multifactor apps? 19 of our 82+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Duo Multifactor

Duo Mobile#1

Duo Mobile by Duo Security LLC

Security made simple
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
Microsoft Authenticator#2

Microsoft Authenticator by Microsoft Corporation

Protects your online identity
Strong Contender
📊 Productivity
4.7😞(663K ratings)
Free
#6in Productivity
Microsoft Authenticator screenshot 1
Microsoft Authenticator screenshot 2
Microsoft Authenticator screenshot 3
Microsoft Authenticator screenshot 4
Microsoft Authenticator screenshot 5
Microsoft Authenticator screenshot 6

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.

What We Love

  • 🚀 Seamless authentication
  • 🔒 Secure login process
  • 👍 Convenient passwordless sign-in
  • 🚀 Smooth app performance

Room to Improve

  • 🐛 Broken Apple Watch functionality
  • 🐛 Backup and restore issues
  • 🐛 Confusing login flow
2FA Authenticator • Auth App+#3

2FA Authenticator • Auth App+ by APPSTER LIMITED

Secure & Fast Authentication
Worth Considering
📊 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.

More Duo Multifactor apps to explore

4
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
5
Google Authenticator
Google Authenticator
Google Authenticator
by Google LLC
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
6
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
7
Google Meet
Google Meet
Google Meet
Video calling and meetings
Free

Connect with friends, family, and colleagues through high-quality video calls and meetings. Schedule calls, send video messages, or join spontaneous conversations. Enhance interactions with features like real-time captions, in-call chat, and engaging effects.

High-quality video callsScheduled meetingsVideo messages
🌐 Social Networking
(2.3M)
freemium
8
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
(46K)
subscription
9
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
10
Due - Reminders & Timers
Due - Reminders & Timers
Due - Reminders & Timers
Never Forget Anything Again
$7.99

This app helps you remember everything you need to do with persistent, effective reminders. It offers fast setup and postponement options, natural language parsing for dates and times, and countdown timers. Keep your tasks in sync across devices and enjoy offline functionality with complete privacy.

Persistent and effective remindersFast reminder setup and postponementNatural date and time parsing
📊 Productivity
(2.8K)
free with in-app purchases
11
iD: Authenticator App
iD: Authenticator App
iD: Authenticator App
RSA Secure ID Authentication
Free

This app provides secure, encrypted authentication codes for your online accounts. It supports industry-standard algorithms and offers multiple ways to add entries, including importing from other apps. Organize your codes with custom icons and search functionality, with automatic backups to iCloud.

Encrypted vault with password/biometric unlockCompatible with Google/Microsoft AuthenticatorSupports HOTP and TOTP algorithms
🌟 Lifestyle
(31)
free with in-app purchases
12
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
13
Authenticator
Authenticator
Authenticator
Simple 2-factor authentication
Free

This app provides a secure and straightforward way to protect your online accounts. It generates one-time passwords that, when combined with your regular password, significantly enhance your account security. The app operates offline, ensuring your sensitive data remains on your device.

Generates one-time passwordsQR code setupEncrypted data storage
🔧 Utilities
(407)
free
14
Authenticator ® App
Authenticator ® App
Authenticator ® App
Two Factor Authentication Aрр
Free

This app enhances online security by managing two-factor authentication codes for over 1,000 applications. It offers features like password leak detection, VPN protection, and secure password autofill, with cloud backups and biometric security options.

Two-factor authentication code generationPassword leak detectionVPN protection
📊 Productivity
(3K)
free with in-app purchases
15
NovoNotes Duo
NovoNotes Duo
NovoNotes Duo
Music Creation Partner
Free

This app extends your desktop Digital Audio Workstation (DAW) with mobile device capabilities. Use your smartphone or tablet as a MIDI controller or run mobile audio plugins directly within your Mac's music production software.

Use mobile audio plugins on Mac DAWIntegrate AUv3 plugin ecosystemTransform smartphone into MIDI controller
🎵 Music
(8)
free
16
Auth0 Guardian
Auth0 Guardian
Auth0 Guardian
Multi Factor Authenticator
Free

This app provides multi-factor authentication by sending push notifications to your device for easy approval or denial of account access. It can also generate one-time passwords for secure logins.

Push notification authenticationAllow/deny account accessOne-time password generation
🔧 Utilities
(101)
free
17
Internet Protection App 2FA+
Internet Protection App 2FA+
Internet Protection App 2FA+
MFA & OTP Keypass Manager
Free

Enhance your online security with this app, providing two-factor authentication (2FA) and multi-factor authentication (MFA) tokens. It generates secure, time-based one-time passwords (TOTP) that update every 30 seconds, working offline for seamless verification across thousands of websites and services.

Two-factor authentication (2FA)Multi-factor authentication (MFA)Time-based one-time passwords (TOTP)
🔧 Utilities
(61)
free with in-app purchases
18
DUO System
DUO System
DUO System
Programming Duo System
Free

Easily program Farfisa Duo System devices with this intuitive application. Streamline your device setup and configuration process.

Program Farfisa Duo System devicesIntuitive interfaceStreamlined configuration
🔧 Utilities
(0)
free
19
Secure Authenticator: OTP, MFA
Secure Authenticator: OTP, MFA
Secure Authenticator: OTP, MFA
Powerful 2FA for Security
Free

This app provides robust two-factor authentication (2FA) to safeguard your online accounts and sensitive data from cyber threats. It offers a straightforward way to manage authentication tokens and secure your logins with ease.

Generate 2FA tokensManage authentication tokensSecure login protection
📊 Productivity
(6)
freemium
20
DUAL Audio Player – Share Music & Listen Songs with Best Friends in Twin Mode w/o Shuffling
DUAL Audio Player – Share Music & Listen Songs with Best Friends in Twin Mode w/o Shuffling
DUAL Audio Player – Share Music & Listen Songs with Best Friends in Twin Mode w/o Shuffling
by A1Brains Infotech
Free

Listen to two different songs at the same time from a single device. This application allows you and a friend to enjoy separate music tracks simultaneously, perfect for sharing your listening experience.

Play two different songs simultaneouslyDual audio playbackShare music with a friend
🎬 Entertainment
(33)
free