2FA Authenticator (2FAS)

2FA Authenticator (2FAS)

#1 Rated 2FA Authenticator

34K ratings
682 reviews
Free

Details

  • Released
  • Updated
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

Good concept but flawed

The push messages are really flaky. I receive the push message, but the app doesn’t always process it properly so it very rarely actually sends a TOTP back to the mac, so I have to manually type it like 80% of the time

Best OTP option for iOS, open source or otherwise

Other options like FreeOTP don't let me view or export the secret, but 2FAS does.
I only wish the app was more discoverable: It doesn't show up when I search for OTP without scrolling wayyy down, and other OTP authenticators are in the Utilities category, while 2FAS is in Productivity.
Very glad I found it, though!
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2FA alternative that works

If you’re looking for a 2FA alternative to Google and Microsoft that works, this is it!

Simple

I appreciate a FOSS authenticator being here, so I can secure my various online accounts more easily.
No ads, no corpo cruff, just an app you can rely on.

Ravens

Raven

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.