2FA Authenticator (2FAS)

2FA Authenticator (2FAS)

#1 Rated 2FA Authenticator

35K ratings
691 reviews
Free

Details

  • Released
  • Updated

Features

2FA Authenticator (2FAS) screenshot #1 for iPhone
2FA Authenticator (2FAS) screenshot #2 for iPhone
2FA Authenticator (2FAS) screenshot #3 for iPhone
2FA Authenticator (2FAS) screenshot #4 for iPhone
2FA Authenticator (2FAS) screenshot #5 for iPhone
2FA Authenticator (2FAS) screenshot #6 for iPhone
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About

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 authentication
Token backup and restore
App protection with passcode/biometrics
Open-source and transparent
Offline functionality
Cross-device sync
One-tap authentication with browser extensions
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What users say

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What's New in 2FA Authenticator (2FAS)

5.4.4

April 26, 2026

Updated translations, services.

User reviews

Everywhere You Want It

As an everyday user who has to rely on these second layer authentication apps, I liked this one the most because of its simplicity and organization. It not only has a way to categorize and color code your entries, but also has an easy way to back up, restore, and share whenever needed.

Works Great

It works. It’s fast. No problems.

Basically Perfect

Great looking app. Well designed, fast, and functional. Seemingly quite good data handling policy. Oh and it’s free. What’s not to love?

Compromised

Everything about this security is garbage , it ruined my entire life because everything I own got hacked. New bank accounts, SECRET BROWSERS , and even my bank accounts.

Auth tokens disappeared

UPDATE: A few months back all of my tokens disappeared after an update. I did receive a response from the developer asking to check the trash and sure enough the tokens were indeed there, which made me very happy and I reconsidered my earlier decision to stop using the app. I also updated the star rating to reflect this. Big thank you to the developer for going the extra mile!
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Developer apps

User experience

🐞

Reported Bugs

3 issues

Tokens disappearing after device changes

Bug

Push notification failures

Bug

Incompatibility with older devices

Bug

Requested Features

5 requests

Alphanumeric passcode option

Feature

Custom icon uploads

Feature

Apple Watch app

Feature

Desktop/web app

Feature

Improved support and communication

Feature

FAQ

What does this app do?

This app enables two-factor authentication (2FA) or multi-factor authentication (MFA) for your online accounts. It helps verify your identity and securely log in, protecting your personal data and passwords from cyber threats.

How does the app protect my accounts?

It uses TOTP and HOTP algorithms to generate time-based or counter-based one-time passwords. You can also enable app protection with a passcode or biometrics, and easily restore your authentication tokens with backups.

Is this app free to use?

Yes, the app is 100% free to use. It does not require an account, does not store any passwords or metadata, and works offline, ensuring maximum privacy and anonymity.

What devices is this app compatible with?

The app syncs across your mobile devices, suggesting compatibility with both Android and iOS platforms. It also offers browser extensions for one-tap authentication.

What are the main benefits of using this authenticator app?

Key benefits include enhanced security for your online accounts, easy token restoration, app protection via biometrics, offline functionality for privacy, and a simple, transparent, open-source interface.