Comparison

2FA Authenticator (2FAS) vs Proton Authenticator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

2FA Authenticator (2FAS)

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
Read full description

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

About

Proton Authenticator

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
Read full description

Get the authenticator trusted by millions — from Proton Mail, the world's largest encrypted email provider. Proton Authenticator is open source, end-to-end encrypted, and protected by strict Swiss privacy laws. Protect all your new accounts and strengthen security on your existing ones. Proton Authenticator keeps your 2FA codes secure, accessible, and completely private — with full control over where your data is stored. KEY FEATURES Local-First Storage:Your 2FA codes are stored entirely on your device, giving you complete control over your data. Effortless Import: Migrate from Google Authenticator, Authy, or any other app in seconds. Secure Backup & Export: Retain full control of your data with easy backup and restore options. Swiss Privacy by Design: Built under Switzerland's strongest data protection regulations. Open Source & Transparent: Auditable code. No tracking. No ads. Take control of your digital security with encryption you can trust. Free to use: No Proton account required, ad-free. Offline support: On mobile and desktop apps No other 2FA app provides this combination of security and privacy. Trusted by millions. Built by Proton. Take control of your digital security today. Terms of service: https://proton.me/legal/terms Learn more: https://proton.me

Screenshots

2FA Authenticator (2FAS)4 screens
Proton Authenticator4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard4 real differences · 6 level
2FA Authenticator (2FAS) versus Proton Authenticator: the parameters behind the verdict, then further details
Parameter2FA Authenticator (2FAS)Proton Authenticator
PriceFreeFree
Rating4.7 (35K ratings) — better4.4 (242 ratings)
Positive reviews77.6% of reviews — better56.3% of reviews
Number of ratings35K — better242
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS18.617.0 — better
Further details — not scored
Size80 MB119 MB
Age rating4+4+
DeveloperTwo Factor Authentication Service Inc.Proton AG

Customer experience

2FA Authenticator (2FAS)

All ratings35,190 ratings
Positive93.2%
Neutral2.0%
Negative4.8%
Written reviews710 reviews
Positive77.6%
Neutral5.5%
Negative16.9%

Proton Authenticator

All ratings242 ratings
Positive82.2%
Neutral7.4%
Negative10.3%
Written reviews231 reviews
Positive56.3%
Neutral20.8%
Negative22.9%

User reviews

2FA Authenticator (2FAS)

From 35K App Store ratings

What we love

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

Room to improve

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

Proton Authenticator

From 242 App Store ratings

What we love

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

Room to improve

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

Bugs and requests

2FA Authenticator (2FAS)

Reported bugs

3 issues
  • Tokens disappearing after device changes
  • Push notification failures
  • Incompatibility with older devices

Requested features

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

Proton Authenticator

Reported bugs

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

Requested features

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

In-app purchases

None

2FA Authenticator (2FAS)

No in-app purchases

None

Proton Authenticator

No in-app purchases

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.

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