Best A2A Authenticator Apps

246+ iOS apps curated and reviewed

4.2 avg rating

20 free apps

Updated October 2026

With an average user rating of 4.2★, the a2a authenticator category is one of the App Store's strongest. Browse all 246+ apps we track, sorted so the most loved ones surface first.

Compare top A2A Authenticator Apps (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	2FA Authenticator (2FAS)	Free	4.7★ (36K)	No	No	Nov 2026
2	A2A Authenticator	Free	—	No	No	May 2026
3	2FA Authenticator-MFA,OTP,Auth	Free	5.0★ (77)	No	Yes	Oct 2026
4	IDMe Authenticator	Free	4.3★ (100K)	No	No	Nov 2026
5	Authenticator - 2FA & MFA	Free	—	No	Yes	Jul 2026
6	Authenticator App: 2FA - MFA	Free	4.5★ (91)	Yes	Yes	Oct 2026
7	RSA Authenticator (SecurID)	Free	2.7★ (335)	No	No	Oct 2026
8	Duo Mobile	Free	4.9★ (2.3M)	No	No	Nov 2026

Top Picks for A2A Authenticator

#1

2FA Authenticator (2FAS) by Two Factor Authentication Service Inc.

#1 Rated 2FA Authenticator

Editor's Choice

📊 Productivity

4.7😊(36K ratings)

Free

2FA Authenticator (2FAS) screenshot 1

2FA Authenticator (2FAS) screenshot 2

2FA Authenticator (2FAS) screenshot 3

2FA Authenticator (2FAS) screenshot 4

2FA Authenticator (2FAS) screenshot 5

2FA Authenticator (2FAS) screenshot 6

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.

What We Love

🚀 Efficient and fast
🔒 Secure and private
👍 Simple and intuitive UI
💡 Customizable icons and folders
🔒 iCloud backup and sync

Room to Improve

🐛 Occasional bugs and crashes
🔒 Lack of password/PIN protection
🕰 No Apple Watch app
🐛 Issues with push notifications
🕰 Missing desktop/web app

#2

A2A Authenticator by Jupiter System & Solution

Strong Contender

📊 Productivity

0.0(0 ratings)

Free

A2A Authenticator screenshot 1

A2A Authenticator screenshot 2

A2A Authenticator screenshot 3

A2A Authenticator screenshot 4

#3

2FA Authenticator-MFA,OTP,Auth by 朝虹陈

Two Factor Authentication Aрр

Worth Considering

📊 Productivity

5.0(77 ratings)

FreeIn-App Purchases

2FA Authenticator-MFA,OTP,Auth screenshot 1

2FA Authenticator-MFA,OTP,Auth screenshot 2

2FA Authenticator-MFA,OTP,Auth screenshot 3

2FA Authenticator-MFA,OTP,Auth screenshot 4

2FA Authenticator-MFA,OTP,Auth screenshot 5

2FA Authenticator-MFA,OTP,Auth screenshot 6

This app provides robust digital security for your online accounts using end-to-end encryption. It simplifies adding accounts, securely backs up and syncs your data, and offers offline password generation. Manage all your passwords and generate strong ones with ease.

More A2A Authenticator apps to explore

IDMe Authenticator

IDMe Authenticator

IDMe Authenticator

This app provides a free multi-factor authentication solution for your account, adding an extra security layer to prevent unauthorized access. It generates secure verification tokens, including time-based codes and push notifications, to confirm your identity during login.

Multi-factor authentication (MFA)Time-based one-time passwords (TOTP)Push notification verification

📊 Productivity

Authenticator - 2FA & MFA

Authenticator - 2FA & MFA

Authenticator - 2FA & MFA

Secure 2FA for All Accounts

Authenticator App: 2FA - MFA

Authenticator App: 2FA - MFA

Authenticator App: 2FA - MFA

Two factor authentication /OTP

This app provides secure and effortless two-factor authentication (2FA) and multi-factor authentication (MFA) by generating time-based one-time passwords (TOTP) for online accounts. It offers encrypted backup, cloud sync, and QR code integration for easy setup and cross-device access, serving as a reliable alternative to other authenticator apps.

Secure 2FA/MFA code generationEncrypted backup and cloud syncQR code integration for easy setup

📊 Productivity

free with in-app purchases

RSA Authenticator (SecurID)

RSA Authenticator (SecurID)

RSA Authenticator (SecurID)

by RSA Security

This app provides multi-factor authentication for enterprises, offering passwordless security through device-bound passkeys. It supports various authentication methods like OTP, biometrics, and push notifications to secure digital access.

Multi-Factor Authentication (MFA)Passwordless Security with PasskeysOne-Time Passcodes (OTP)

Security made simple

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.

Two-factor authenticationPasscode generationPush notification authentication

Authenticator App ·

Authenticator App ·

Authenticator App ·

Two Factor Authentication, 2FA

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

free with in-app purchases

Authenticator App - 2FA AI

Authenticator App - 2FA AI

Authenticator App - 2FA AI

Two factor Authentication-OTP

Authenticator - 2FA Security

Authenticator - 2FA Security

Authenticator - 2FA Security

Protect your online Account

This app provides secure two-factor authentication (2FA) for your online accounts. It generates time-based one-time passwords (TOTP) to protect against unauthorized access, working with thousands of popular services. All data is encrypted for your privacy and security.

Secure two-factor authentication (2FA)Generates Time-based One-time Passwords (TOTP)Works with thousands of popular online services

free with in-app purchases

Authenticator App : Scan & 2FA

Authenticator App : Scan & 2FA

Authenticator App : Scan & 2FA

Secure Authenticator 2FA & MFA

Enhance your account security with this app, offering robust two-factor and multi-factor authentication. It generates secure verification codes for over 1000 popular services and backs them up safely via iCloud. Protect your sensitive data with an extra layer of defense.

Two-factor and Multi-Factor AuthenticationSecure code generation for 1000+ appsiCloud backup for verification codes

free with in-app purchases

2FA Code Generator

This app generates time-based and counter-based one-time passwords for multi-factor authentication. It enhances account security by providing an extra layer of verification for services like Google and Bouqt apps. Data is stored securely on your device's keychain.

Multi-factor authentication code generationSupports time-based and counter-based OTPsOffline functionality (no internet required)

2FA Authenticator・OTP Authy

2FA Authenticator・OTP Authy

2FA Authenticator・OTP Authy

Two Factor Authentication・Auth

This app generates one-time passwords for two-factor authentication, helping to secure your online accounts. It supports multiple services and works offline, offering a user-friendly interface for easy management of your security codes.

Generate one-time passwordsSupport for multiple accountsOffline functionality

Authenticator App • 2FA, MFA

Authenticator App • 2FA, MFA

Authenticator App • 2FA, MFA

Two Factor Authentication, OTP

Enhance your online security with time-sensitive codes for account access. This tool prevents unauthorized entry even if passwords are compromised. It's user-friendly, supports multiple accounts, and offers peace of mind for your sensitive information.

Generates time-sensitive 2FA codesProtects against unauthorized accessSupports multiple accounts

free with in-app purchases

Authenticator App - Official ™

Authenticator App - Official ™

Authenticator App - Official ™

Authenticator 2FA Auth Secure

Enhance your online security with this app, providing an extra layer of protection for your sensitive data. It generates one-time passwords for secure logins across various accounts, even offline. Features include cloud backup and QR code scanning for easy account management.

Two-Factor Authentication (2FA)Multi-Factor Authentication (MFA)One-Tap Authentication (TOTP)

Salesforce Authenticator

Salesforce Authenticator

Salesforce Authenticator

by salesforce.com

Enhance your online security with multi-factor authentication. This app sends push notifications to your device for identity verification, allowing you to approve or deny login attempts with a simple tap. It also offers one-time verification codes for offline use and can automate approvals for trusted locations.

Multi-factor authenticationPush notification approvalsOne-time verification codes

Authenticator App ⋆

Authenticator App ⋆

Authenticator App ⋆

2FA Two Factor Authentication

Enhance your online security by generating and storing 2FA and MFA codes for various services. Securely log in to accounts with time-based one-time passwords and easily copy codes to your clipboard.

Generate 2FA/MFA codesSupport for popular servicesScan QR codes to add services

📊 Productivity

2FA Authenticator • MFA Verify

2FA Authenticator • MFA Verify

2FA Authenticator • MFA Verify

Secure Two Factor - Auth & OTP

This app provides enhanced security for your online accounts by generating temporary, time-based codes. It offers one-tap authentication, secure cloud backup, and flexible account management for a safer digital experience.

One-Tap AuthenticationMulti-Factor SecurityTime-Based One-Time Passwords (TOTP)

Authenticator App -2FA Secure

Authenticator App -2FA Secure

Authenticator App -2FA Secure

Secure Sign into Your Accounts

This app provides a secure way to manage your online accounts with two-factor authentication (2FA). It generates time-based one-time passwords (TOTP) to protect against unauthorized access and offers features like cloud synchronization, a private photo album, and a security center for enhanced digital safety.

Two-factor authentication (2FA) supportGenerates time-based one-time passwords (TOTP)Cloud synchronization for data backup

free with in-app purchases

FAQ about A2A Authenticator

What are the best a2a authenticator apps for iPhone?

2FA Authenticator (2FAS) tops our a2a authenticator apps ranking as of October 2026, with a 4.7-star average from 36K App Store ratings, and it's free to download.

Are there free a2a authenticator apps for iPhone?

Yes — 20 of the top a2a authenticator apps we rank are free to download, including 2FA Authenticator (2FAS) and A2A Authenticator.

Does 2FA Authenticator (2FAS) have ads or in-app purchases?

2FA Authenticator (2FAS) has no ads and has no in-app purchases, according to its App Store listing as of October 2026.

How many a2a authenticator apps are on the App Store?

We track 246+ a2a authenticator apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.