Best Duo Two Factor Apps

231+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated May 2026

Duo Mobile is the household name in duo two factor, but it's far from the only option. We track 231+ alternatives and competitors on iOS β€” many free, many higher-rated than you'd expect.

Top Picks for Duo Two Factor

Duo Mobile#1

Duo Mobile by Duo Security LLC

Security made simple
Editor's Choice
πŸ’Ό Business
4.9😐(2.1M ratings)
Free
#16in Business
Duo Mobile screenshot 1
Duo Mobile screenshot 2
Duo Mobile screenshot 3
Duo Mobile screenshot 4

"Duo Mobile simplifies security by generating passcodes for two-factor authentication and providing easy, one-tap login authentication through push notifications on iOS devices. It also manages two-factor authentication for various other services and applications. Activate and link the app to your Duo account to start using its features."

What We Love

  • πŸ‘ Simple and easy to use
  • πŸ”’ Provides an extra layer of security
  • πŸš€ Quick and convenient authentication
  • πŸ”’ Secure login experience

Room to Improve

  • πŸ› Unreliable notifications and push functionality
  • πŸ› Compatibility issues when changing devices
  • πŸ› Slow and frustrating authentication process
Two Factor Authenticator & OTP#3

Two Factor Authenticator & OTP by HENRY FOSTER

Simple 2FA authentication app
Worth Considering
πŸ”§ 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

The application provides a robust two-factor authentication (2FA) and multi-factor authentication (MFA) solution, ensuring the security of your sensitive information. With features like TOTP and HOTP support, encrypted data storage, and user-friendly design, this app empowers you to take control of your digital safety. Download it today and experience top-level online security.

More Duo Two Factor apps to explore

4
2FAuthify - Authenticator app
2FAuthify - Authenticator app
2FAuthify - Authenticator app
Two Factor Authenticator
Free

Secure your online accounts with a powerful two-factor authentication app that generates, stores, and manages 2FA and MFA codes. Protect your digital life with strong encryption, cloud backup, and cross-device synchronization, and try it out today for a safer online experience.

πŸ“Š Productivity
(30)
5
Authenticator app - 2FA, MFA
Authenticator app - 2FA, MFA
Authenticator app - 2FA, MFA
Two Factor Authentication, OTP
Free

Protect your accounts with our free authenticator app that offers 2FA security for various platforms. With support for over 1000 apps, including Apple Watch compatibility, ensure your accounts are secure.

πŸ”§ Utilities
(4.9K)
6
Multi Authenticator: OTP, MFA
Multi Authenticator: OTP, MFA
Multi Authenticator: OTP, MFA
Mobile 2FA for your Security
Free

Protect your online accounts with a simple and secure two-factor authentication (2FA) app that stores and manages your authentication codes on your device with end-to-end encryption. Download now and take control of your digital security by strengthening your account protection and easily restoring your codes when needed.

πŸ“° Magazines & Newspapers
(34)
7
Authenticator: Secure 2FA, MFA
Authenticator: Secure 2FA, MFA
Authenticator: Secure 2FA, MFA
2 Step Verification Auth: TOTP
Free

Enhance your account security with a powerful and easy-to-use two-factor authentication tool that generates time-based one-time passwords for your online accounts, providing secure cloud backup, biometric and PIN protection, and offline functionality. Get started with a simple QR code setup or secret key entry to safeguard your accounts effortlessly.

πŸ”§ Utilities
(61)
8
Authenticator: Secure 2FA Auth
Authenticator: Secure 2FA Auth
Authenticator: Secure 2FA Auth
2 Factor Authentication: MFA
Free

This application helps you organize and protect your two-factor authentication tokens and passwords in one secure place, with features like secure browsing and data encryption. Download now to effortlessly manage your sensitive data and upgrade to a premium subscription for unlimited 2FA codes, password generation, and more.

πŸ”§ Utilities
(3)
9
Two Factor Authenticator App
Two Factor Authenticator App
Two Factor Authenticator App
Simple 2FA Authentication
Free

A secure 2FA authentication app that generates and stores codes for enhanced online account protection. Features include encrypted data storage, seamless device sync, FaceID support, offline code generation, and a private browser. Protect your accounts with this app for simplicity and security. View Privacy Policy and Terms of Use.

πŸ”§ Utilities
(58)
10
MFA Authenticator: Secure 2FA
MFA Authenticator: Secure 2FA
MFA Authenticator: Secure 2FA
2 Factor Auth: OTP & Verify
Free

Protect your online identity with this easy-to-use 2FA app, which secures your personal data and passwords with simple, private, and secure two-factor authentication across all your accounts. Download now and take control of your online security with seamless sync, intuitive interface, and helpful customer support.

πŸ”§ Utilities
(29)
11
Authenticator App - 2FA Totp
Authenticator App - 2FA Totp
Authenticator App - 2FA Totp
MFA Authentication 2 Factor
Free
πŸ”§ Utilities
(24)
12
Authenticator Duo: Two Factor
Authenticator Duo: Two Factor
Authenticator Duo: Two Factor
2Fa Authy, MFA Authentication
Free

Secure your online accounts with our app that provides two-factor authentication for enhanced security. Easily scan, generate, and store 2FA codes for multiple accounts. Keep your information safe with our reliable authentication solution.

πŸ”§ Utilities
(14)
13
Authenticator Duo - Two Factor
Authenticator Duo - Two Factor
Authenticator Duo - Two Factor
MFA Authentication & 2Fa Authy
Free

This app provides a secure and reliable method for protecting online accounts with advanced security protocols and two-factor authentication, generating unique codes for access. Download now to enhance online security with easy setup, backup, and sync features, and take the first step towards a safer online presence.

πŸ”§ Utilities
(7)
14
Google Authenticator
Google Authenticator
Google Authenticator
by Google
Free

A secure two-step verification app that generates codes for logging into online accounts, adding an extra layer of security beyond passwords. Easily sync codes across devices, set up accounts with QR codes, and manage multiple accounts in one place. To start securing your accounts, enable 2-Step Verification on your Google Account.

πŸ”§ Utilities
(1M)
15
2FA Authenticator β€’ Auth App+
2FA Authenticator β€’ Auth App+
2FA Authenticator β€’ Auth App+
Secure & Fast Authentication
Free

Easily add an extra layer of security to your accounts with this app. Protect your logins with two-factor authentication for enhanced security.

πŸ“Š Productivity
(95)
16
Authenticator App - Two Factor
Authenticator App - Two Factor
Authenticator App - Two Factor
Two-factor - Duo Security
Free

Secure all your online accounts with our must-have Authenticator App - Two Factor. Our app provides simple and free Two Factor Authentication (2FA) solutions to keep your accounts safe with 6-digit Time-Based One-Time Passwords (TOTP). Protect your accounts from hackers by adding an extra layer of security today.

πŸ”§ Utilities
(400)
17
Authenticator - Two Factor App
Authenticator - Two Factor App
Authenticator - Two Factor App
MFA & 2FA Verify, Security
Free

This two-factor authentication app generates time-based one-time passwords to enhance online account security, offering easy setup, reliable protection, and seamless device synchronization. Download now to secure your online presence with quick setup, regularly updated OTP, and universal compatibility.

πŸ”§ Utilities
(6)
18
Authenticator App - Duo Factor
Authenticator App - Duo Factor
Authenticator App - Duo Factor
Two Step Verification Security
Free

This app is an AI-powered tool that allows you to transform your home effortlessly. Simply take a photo of the space you want to change, choose from various design styles, and watch your vision come to life in real-time. With a subscription, you can unlock premium features, including the ability to add codes to the app for enhanced security.

πŸ”§ Utilities
(5)
19
Authenticator App: Two Factor.
Authenticator App: Two Factor.
Authenticator App: Two Factor.
MFA and 2FA Verify, Security
Free

An app powered by advanced AI that helps you visually transform any room in real-time with different styles like modern, vintage, minimalist, or bohemian. Subscribe for unlimited access to all features. Contact for support and check out our privacy policy and terms of use.

πŸ’Ό Business
(9)
20
Authenticator App β„’
Authenticator App β„’
Authenticator App β„’
Two Factor Authentication
Free

Secure your online accounts with an advanced two-factor authentication app that generates time-based codes for enhanced security when logging in. Compatible with over 2,500 websites, streamline your multi-factor authentication setup by scanning QR codes.

πŸ”§ Utilities
(21K)

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