Best A2A Authenticator Apps

241+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated May 2026

With an average user rating of 4.4β˜…, the a2a authenticator category is one of the App Store's strongest. Browse all 241+ apps we track, sorted so the most loved ones surface first.

Top Picks for A2A Authenticator

RSA Authenticator (SecurID)#2

RSA Authenticator (SecurID) by RSA Security

Strong Contender
πŸ’Ό Business
2.7😞(319 ratings)
Free
RSA Authenticator (SecurID) screenshot 1
RSA Authenticator (SecurID) screenshot 2
RSA Authenticator (SecurID) screenshot 3
RSA Authenticator (SecurID) screenshot 4
RSA Authenticator (SecurID) screenshot 5
RSA Authenticator (SecurID) screenshot 6

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.

What We Love

  • πŸš€ Works great
  • πŸ”’ Secure authentication
  • πŸ‘ Easy to use
  • πŸš€ Convenient alternative to hardware token

Room to Improve

  • πŸ› Face ID bug
  • πŸ› Persistent token disappearing issue
  • πŸ› Buggy app
Salesforce Authenticator#3

Salesforce Authenticator by salesforce.com

Worth Considering
πŸ’Ό Business
4.6😐(4.1K ratings)
Free
Salesforce Authenticator screenshot 1
Salesforce Authenticator screenshot 2
Salesforce Authenticator screenshot 3
Salesforce Authenticator screenshot 4
Salesforce Authenticator screenshot 5

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.

What We Love

  • πŸš€ Fast and efficient
  • πŸ”’ Secure authentication
  • πŸ‘ Easy to use
  • πŸ”‹ Reliable backup feature

Room to Improve

  • πŸ› Inconsistent location tracking
  • πŸ› Frequent re-authentication required
  • πŸ› Unreliable push notifications

More A2A Authenticator apps to explore

4
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
πŸ“Š Productivity
(34K)
free
5
ID.me Authenticator
ID.me Authenticator
ID.me Authenticator
by ID.me, Inc.
Free

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
πŸ“Š Productivity
(100K)
free
6
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
πŸ“Š Productivity
(663K)
free
7
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
πŸ”§ Utilities
(1.1M)
free
8
Authenticator Β©
Authenticator Β©
Authenticator Β©
Authenticator app, 2fa
Free

Secure your online accounts with two-factor authentication tokens. Easily add accounts by scanning QR codes or manual entry. This app also offers password management to store and organize your credentials.

Secure accounts with 2FAAdd accounts via QR code or manual entryPassword management and storage
πŸ’Ό Business
(2.3K)
free with in-app purchases
9
Authenticator Β·
Authenticator Β·
Authenticator Β·
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
πŸ”§ Utilities
(26K)
free with in-app purchases
10
Authenticator App β„’
Authenticator App β„’
Authenticator App β„’
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
πŸ”§ Utilities
(21K)
free with in-app purchases
11
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
πŸ“Š Productivity
(12K)
subscription
12
Authenticator β„  App
Authenticator β„  App
Authenticator β„  App
2FA, Two Factor Authentication
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
πŸ”§ Utilities
(4K)
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
πŸ”§ Utilities
(407)
free
14
Authenticator App - Authkey
Authenticator App - Authkey
Authenticator App - Authkey
Two factor authentication, 2fa
Free

Enhance your online security with this app, offering a secure and reliable method to protect your accounts. It generates unique codes for two-factor authentication, ensuring your personal information stays safe.

Account protection with 2FAEasy setup and managementBackup and sync accounts
πŸ”§ Utilities
(3.3K)
free with in-app purchases
15
Authenticator App†
Authenticator App†
Authenticator App†
2FA Authentication MFA OTP
Free

Secure your online accounts with a versatile two-factor authentication solution. Manage all your authentication codes in one place, offering enhanced security for websites, services, and crypto wallets. Supports biometric access and offline code generation.

Two-factor authentication (2FA)Multi-factor authentication (MFA)Time-based one-time passwords (TOTP)
πŸ”§ Utilities
(1.8K)
free with in-app purchases
16
Duo Mobile
Duo Mobile
Duo Mobile
Security made simple
Free

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
πŸ’Ό Business
(2.2M)
free
17
Authy Authenticator
Authy Authenticator
Authy Authenticator
2FA Authentication MFA & OTP
Free

Secure your online accounts with this Two-Factor Authentication (2FA) app. It generates time-based one-time passwords (TOTP) and offers encrypted backups, multi-device sync, and offline access. Protect your accounts from unauthorized access with robust security features.

Encrypted iCloud BackupApple Watch SupportMulti-Device Sync
πŸ“Š Productivity
(12)
free with in-app purchases
18
Authenticator App β€’ 2FA β€’ MFA
Authenticator App β€’ 2FA β€’ MFA
Authenticator App β€’ 2FA β€’ 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)
πŸ”§ Utilities
(880)
free with in-app purchases
19
Authenticator App Β· 2FA
Authenticator App Β· 2FA
Authenticator App Β· 2FA
2FA: Two Factor Authentication
Free

This app provides an extra layer of security for your online accounts by generating time-based one-time passwords (TOTP/OTP) for two-factor authentication. It supports numerous services and offers features like encrypted sync, passkey support, and app-level security.

Generate 2-factor authentication codesSupport for passkeys and passwordless loginsEncrypted sync and backup via iCloud/Google Cloud
πŸ”§ Utilities
(343)
subscription
20
Authenticator App οΌ‹
Authenticator App οΌ‹
Authenticator App οΌ‹
Authentication App, Copilot
Free

Secure your online accounts with an authentication and password management tool. It offers AI assistance for setup, generates strong passwords, and detects data leaks and phishing sites. Access is secured with biometric authentication.

Account Authentication CopilotPassword Generator & Manager2FA Support
πŸ’Ό Business
(1.2K)
free with in-app purchases