# 2FA Authenticator (2FAS) vs Chronos Authenticator

The clearest difference is ratings volume: 2FA Authenticator (2FAS) at 35K against Chronos Authenticator's 3. 2FA Authenticator (2FAS) also leads on device support (3 vs 1). Chronos Authenticator's advantage is update cadence (every 6 days vs monthly) and review sentiment (100% vs 78%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Chronos Authenticator holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: 2FA Authenticator (2FAS) has 35K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 78% of 2FA Authenticator (2FAS)'s written reviews are positive against 100% of Chronos Authenticator's.

2FA Authenticator (2FAS) ships an update monthly, Chronos Authenticator every 6 days. The most recent releases landed on October 1, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 2FA Authenticator (2FAS) | Chronos Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (35K ratings)](https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/chronos-authenticator/id6503929490/reviews)** |
| Number of ratings | **35K** | 3 |
| Positive reviews | 77.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Free | Free |
| Size | 80 MB | 11 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Two Factor Authentication Service Inc.](https://appshunter.io/developer/1217793793) | [Joel-David Wong](https://appshunter.io/developer/1750409239) |

## What reviewers say

### 2FA Authenticator (2FAS)

[App page](https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794)

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.

**Highlights:** 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

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

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


### Chronos Authenticator

[App page](https://appshunter.io/ios/app/chronos-authenticator/id6503929490)

This open-source app provides secure two-factor authentication using time-based and counter-based methods. It offers end-to-end encryption for token data and optional iCloud backup and sync for convenience. Easily import and export your authentication tokens.

**Highlights:** Open-source, End-to-end encrypted token storage, Optional iCloud backup and sync, Token export and import, Anonymous usage (no account required)

**In-app purchases:** none


## Frequently asked questions

### Is 2FA Authenticator (2FAS) free?

2FA Authenticator (2FAS) is free to download, with no in-app purchases.

### Is Chronos Authenticator free?

Chronos Authenticator is free to download, with no in-app purchases.

### Which has better reviews, 2FA Authenticator (2FAS) or Chronos Authenticator?

Chronos Authenticator is rated higher. 2FA Authenticator (2FAS) averages 4.7 out of 5 from 35K ratings, while Chronos Authenticator averages 5.0 from 3 ratings.

### Do 2FA Authenticator (2FAS) or Chronos Authenticator have ads?

Neither 2FA Authenticator (2FAS) nor Chronos Authenticator shows ads.

### Which is updated more often, 2FA Authenticator (2FAS) or Chronos Authenticator?

2FA Authenticator (2FAS) ships an update monthly, and Chronos Authenticator every 6 days. Most recently, 2FA Authenticator (2FAS) was updated on October 1, 2026 and Chronos Authenticator on September 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*