Best Authentication App

250+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated August 2026

Google Authenticator is the household name in authentication app, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Authentication App (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Google AuthenticatorGoogle AuthenticatorFree4.9★ (1.1M)NoNoAug 2026
2Microsoft AuthenticatorMicrosoft AuthenticatorFree4.7★ (677K)NoNoAug 2026
3Duo MobileDuo MobileFree4.9★ (2.2M)NoNoAug 2026
4Authenticator AppAuthenticator AppFree4.6★ (48K)NoYesAug 2026
5ID.me AuthenticatorID.me AuthenticatorFree4.3★ (100K)NoNoAug 2026
6Authenticator ·Authenticator ·Free4.6★ (26K)NoYesAug 2026
7Authenticator - OTP SecurityAuthenticator - OTP SecurityFree5.0★ (1)NoYesAug 2026
8Authenticator App₊Authenticator App₊Free5.0★ (1)YesYesAug 2026

Top Picks for Authentication App

Google Authenticator#1

Google Authenticator by Google LLC

Editor's Choice
🔧 Utilities
4.9😞(1.1M ratings)
Free
#5in Utilities
Google Authenticator screenshot 1
Google Authenticator screenshot 2
Google Authenticator screenshot 3
Google Authenticator screenshot 4
Google Authenticator screenshot 5
Google Authenticator screenshot 6

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.

What We Love

  • 👍 User-friendly
  • 🔒 Secure authentication
  • 🚀 Simple and fast
  • 🔒 Reliable security

Room to Improve

  • 🐛 Randomly deleted all codes
  • 🐛 Unreliable, lost access to accounts
  • 🐛 Timing issues, codes didn't work
Microsoft Authenticator#2

Microsoft Authenticator by Microsoft Corporation

Protects your online identity
Strong Contender
📊 Productivity
4.7😞(677K ratings)
Free
#9in 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
Duo Mobile#3

Duo Mobile by Duo Security LLC

Security made simple
Worth Considering
💼 Business
4.9😐(2.2M ratings)
Free
#17in 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

More Authentication App apps to explore

4
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
5
ID.me Authenticator
ID.me Authenticator
ID.me Authenticator
by ID.me
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
📊 Productivity
(100K)
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
Authenticator - OTP Security
Authenticator - OTP Security
Authenticator - OTP Security
Multi-Factor Authentication
Free

This app provides two-factor authentication (2FA) to secure your online accounts. It allows for quick setup, organization, and backup of your verification codes and passwords across devices. Enhance your digital security with this essential tool.

Two-Factor Authentication (2FA)Quick account setup and organizationBackup and sync across devices
🔧 Utilities
(1)
free with in-app purchases
8
Authenticator App₊
Authenticator App₊
Authenticator App₊
For 2FA MFA OTP Two ID Verify
Free

This app generates secure, time-based one-time passwords (TOTP) for two-factor authentication (2FA) and multi-factor authentication (MFA). It supports QR code scanning and manual setup, works offline, and offers encrypted backups and iCloud sync across Apple devices.

Secure 2FA & MFA code generationQR code scanner and manual setupOffline authentication codes
🔧 Utilities
(1)
free with in-app purchases
9
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
(24K)
free with in-app purchases
10
LinOTP Authenticator
LinOTP Authenticator
LinOTP Authenticator
by KeyIdentity GmbH
Free
🔧 Utilities
(0)
11
Authenticator App - Auth Code
Authenticator App - Auth Code
Authenticator App - Auth Code
2FA Authentication - OTP Token
Free

Enhance your online security by generating secure one-time passwords for social media, email, and crypto wallets. This app offers a fast QR code scanner, biometric security, and works offline. It also includes a robust password manager and strong password generator.

Time-based One-Time Passwords (TOTP)Lightning-Fast QR Code ScannerSecure iCloud Backup & Sync (PRO)
🔧 Utilities
(1)
freemium
12
Authenticator App 2FA & MFA
Authenticator App 2FA & MFA
Authenticator App 2FA & MFA
Two Factor Authentication
Free

This app provides robust security by combining two-factor authentication, password management, and privacy tools. It offers secure storage, autofill capabilities, and encrypted cloud backup for your digital information. Protect your accounts and sensitive data with advanced encryption and smart security features.

Two-Factor Authentication (2FA)Password Manager & AutofillEncrypted Cloud Sync & Backup
🔧 Utilities
(2)
free with in-app purchases
13
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
(35K)
free
14
Authenticator App ・ 2FA & OTP
Authenticator App ・ 2FA & OTP
Authenticator App ・ 2FA & OTP
Two Factor Authentication・MFA
Free

Securely generate and manage two-factor authentication codes for your online accounts. Offers encrypted backups, offline access, and additional security features like a password generator and private browser.

Time-based one-time password generationOffline code accessEncrypted iCloud backup
🔧 Utilities
(2)
free with in-app purchases
15
Authenticator App - 2FA / OTP
Authenticator App - 2FA / OTP
Authenticator App - 2FA / OTP
Two-Factor Login & Secure MFA
Free

This app provides secure two-factor authentication (2FA) and multi-factor authentication (MFA) by generating time-based one-time passwords (TOTP) for online accounts. It offers encrypted backups, cloud sync, and QR code support for easy account management across multiple devices.

Secure 2FA/MFA code generationEncrypted backup and cloud syncQR code account addition
📊 Productivity
(5)
free with in-app purchases
16
Authenticator app, 2FA and MFA
Authenticator app, 2FA and MFA
Authenticator app, 2FA and MFA
Password Generator,OTP Manager
Free
📊 Productivity
(0)
17
QuickLaunch Mobile
QuickLaunch Mobile
QuickLaunch Mobile
by QuickLaunch, LLC
Free

Access all your organization's applications securely from your mobile device with a single login. Features include custom branding, two-factor authentication, and biometric app lock for enhanced security and productivity.

Single Sign-On to AppsTwo-Factor LoginBiometric App Lock
📊 Productivity
(9)
free
18
Authenticator App 2FA — Lokio
Authenticator App 2FA — Lokio
Authenticator App 2FA — Lokio
OTP, MFA & TOTP code manager
Free
🔧 Utilities
(0)
19
OneWelcome Authenticator
OneWelcome Authenticator
OneWelcome Authenticator
by OneWelcome B.V.
Free
🔧 Utilities
(0)
20
Card Authenticator
Card Authenticator
Card Authenticator
by WEX, Inc.
Free
💰 Finance
(0)

FAQ about Authentication App

What is the best authentication app for iPhone?
Google Authenticator tops our authentication app ranking as of August 2026, with a 4.9-star average from 1.1M App Store ratings, and it's free to download.
Yes — 20 of the top authentication app we rank are free to download, including Google Authenticator and Microsoft Authenticator.
Google Authenticator has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 250+ authentication app on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Google Authenticator adds an extra layer of security to your online accounts by generating a second verification code needed to sign in, in addition to your password. This code is generated on your phone.
You can set up your Authenticator accounts automatically by scanning a QR code provided by the service you wish to secure. This is a quick and easy process that ensures correct setup.

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