# 2FA Authenticator (2FAS) — #1 Rated 2FA Authenticator

> Secure, private, and simple two-factor authentication app for account protection. (iPhone/iPad app by Two Factor Authentication Service Inc..)

- Source: https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794 (this page in markdown: same URL + `.md`)
- Developer: [Two Factor Authentication Service Inc.](https://appshunter.io/developer/1217793793)
- Category: Productivity, Business
- Price: Free
- Rating: 4.70/5 from 34,678 App Store ratings · 697 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.4 · 83 MB
- Languages: American English, Dutch, French (France), German (Germany), Greek, Indonesian, Italian, Japanese, Polish, Brazilian Portuguese and 6 more
- Released: 2017-08-04
- Data updated: 2026-08-29
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794/reviews.md

## What is 2FA Authenticator (2FAS)?

2FAS is the easiest way to enable two-factor authentication (or multi-factor authentication) to verify your identity and securely log in to accounts to keep your personal data and passwords protected from cyber threats — all from one app, 100% free!

The world’s most secure, private, and simple 2FA app.

Secure:
• Easily restore your tokens with backups.
• Add app protection with your passcode or biometrics.
• 2FAS is open-source, transparent, and community-driven.

Simple:
• 2FAS syncs across your mobile devices.
• An interface designed for simplicity.
• One-tap authentication with 2FAS Browser Extensions.
• Multi-language support.
• Quick guides for setup and support.

Private:
• 2FAS works offline.
• 2FAS doesn't store any passwords or metadata.
• 100% anonymous use, no account required.

It’s not too late to protect your data, so what are you waiting for? Protect your online accounts and services now with TOTP and HOTP algorithms. 

Start using the 2FAS authenticator app today!

If you have any questions, talk with us on our Discord server: https://discord.gg/q4cP6qh2g5 

Learn more about 2FAS:
• Check our GitHub repository: https://github.com/twofas
• Visit our website at: https://2fas.com/
• Follow us on X: https://x.com/2FAS_com
• Subscribe on YouTube: https://www.youtube.com/@2FAS

## Key features

- 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

## What do users think of 2FA Authenticator (2FAS)?

Overall sentiment: positive

**Pros**

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

**Cons**

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

**Commonly reported bugs**

- Tokens disappearing after device changes
- Push notification failures
- Incompatibility with older devices

**Most requested features**

- Alphanumeric passcode option
- Custom icon uploads
- Apple Watch app
- Desktop/web app
- Improved support and communication

## Recent user reviews (10 of 697)

All indexed reviews: https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794/reviews.md

### 5/5 — Works like. Charm!

*2026-08-24, version 5.4.4*

I’ve never had an issue, work great.

### 5/5 — Just remember to back up to iCloud!!!

*2026-08-21, version 5.4.4*

This is your only path to recovery… so turn it on


Otherwise this rocks!

### 5/5 — Great but a question.

*2026-08-15, version 5.4.4*

So far I have no issues, works as intended. I just had a question that is it possible for this app to loose all my auths or for the app to shut down, is this a possibility or do I not have to worry about loosing anything?

### 5/5 — 2FA Authenticator (2FAS)

*2026-08-14, version 5.4.4*

I love this app it transfer all my data from google Authenticator at easy

### 3/5 — Nice app but…

*2026-08-13, version 5.4.4*

The prompt to review when I open it to get a code is an infuriating thing.

Also, having to join a discord server just to suggest that maybe there should be an icon for a particular service or website?! Bah!

### 5/5 — good

*2026-08-09, version 5.4.4*

nice

### 5/5 — Everywhere You Want It

*2026-08-02, version 5.4.4*

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.

### 5/5 — Works Great

*2026-08-01, version 5.4.4*

It works. It’s fast. No problems.

### 5/5 — Basically Perfect

*2026-07-30, version 5.4.4*

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

### 1/5 — Compromised

*2026-07-29, version 5.4.4*

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.

## Frequently asked questions about 2FA Authenticator (2FAS)

### 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.

## Version history (last 5 releases)

### 5.4.4 — 2026-04-26

Updated translations, services.

### 5.4.3 — 2026-04-15

Improved the syncing mechanism.

### 5.4.2 — 2026-03-18

Improved backup mechanism with better error handling.

### 5.4.1 — 2026-03-12

Improvements for new sync and watch apps.

### 5.4.0 — 2026-03-04

Feature you've been asking for: new iCloud Backup with optional password protection.

## Apps similar to 2FA Authenticator (2FAS)

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Authenticator App](https://appshunter.io/ios/app/authenticator-app/id1538761576) | 4.6 (47,910) | Free | Productivity |
| [Microsoft Authenticator](https://appshunter.io/ios/app/microsoft-authenticator/id983156458) | 4.7 (686,512) | Free | Productivity |
| [Authenticator App+](https://appshunter.io/ios/app/authenticator-app-plus/id1610508128) | 4.8 (11,857) | Free | Productivity |
| [Authenticator App : 2FA & MFA](https://appshunter.io/ios/app/authenticator-app-2fa-and-mfa/id6450535322) | 4.5 (658) | Free | Productivity |
| [Authenticator App: 2FA, MFA](https://appshunter.io/ios/app/authenticator-app-2fa-mfa/id6472872177) | 4.2 (86) | Free | Productivity |
| [2FA Authenticator Secure](https://appshunter.io/ios/app/2fa-authenticator-secure/id1604264315) | 4.4 (172) | Free | Productivity |

## More apps by Two Factor Authentication Service Inc.

- [Password Manager (2FAS Pass)](https://appshunter.io/ios/app/password-manager-2fas-pass/id6504464955)

All apps by Two Factor Authentication Service Inc.: https://appshunter.io/developer/1217793793

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*