# 2FA Authenticator (2FAS) vs Proton Authenticator

The clearest difference is ratings volume: 2FA Authenticator (2FAS) at 35K against Proton Authenticator's 242. 2FA Authenticator (2FAS) also leads on review sentiment (78% vs 56%) and rating (4.7 vs 4.4). Proton Authenticator's advantage is update cadence (weekly vs monthly). 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.

2FA Authenticator (2FAS) holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: 2FA Authenticator (2FAS) has 35K ratings behind it against 242, 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 56% of Proton Authenticator's.

2FA Authenticator (2FAS) ships an update monthly, Proton Authenticator weekly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 2FA Authenticator (2FAS) | Proton Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (35K ratings)](https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794/reviews)** | [4.4 (242 ratings)](https://appshunter.io/ios/app/proton-authenticator/id6741758667/reviews) |
| Number of ratings | **35K** | 242 |
| Positive reviews | **77.6% of reviews** | 56.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free | Free |
| Size | 80 MB | 119 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Two Factor Authentication Service Inc.](https://appshunter.io/developer/1217793793) | [Proton AG](https://appshunter.io/developer/979659484) |

## 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


### Proton Authenticator

[App page](https://appshunter.io/ios/app/proton-authenticator/id6741758667)

Securely manage your two-factor authentication codes with an open-source, end-to-end encrypted authenticator app. It offers seamless cross-device syncing, effortless import from other apps, and robust backup options, all protected by strict Swiss privacy laws. Take control of your digital security with a trusted and private solution.

**Highlights:** End-to-end encrypted iCloud sync, Effortless import from other authenticators, Secure backup and export, Swiss privacy by design, Open source and transparent, Offline support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Cross-platform support
- 🔒 Secure cloud sync
- 👍 Easy import from other authenticators
- 🚀 Convenient 'next' feature for codes

**What reviewers complain about**

- 🐛 Buggy UI (scrolling jitters, random sorting)
- 👎 Lack of customization options (pin favorites, change icons)
- 🐛 Sync/login issues on iPad

**Reported bugs**

- Sync/login loop on iPad
- 2FA input broken on non-iPhone devices
- Screen strobing on iPad
- Duplicate entries after import

**Requested features**

- PIN unlock for desktop
- Alphabetical sorting option
- Export function (not just Proton-specific backup)
- Native macOS app
- Option to hide item icons


## Frequently asked questions

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

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

### Is Proton Authenticator free?

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

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

2FA Authenticator (2FAS) is rated higher. 2FA Authenticator (2FAS) averages 4.7 out of 5 from 35K ratings, while Proton Authenticator averages 4.4 from 242 ratings.

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

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

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

2FA Authenticator (2FAS) ships an update monthly, and Proton Authenticator weekly. Most recently, 2FA Authenticator (2FAS) was updated on September 24, 2026 and Proton Authenticator on September 22, 2026.

---

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