Comparison

Auth Authenticator vs Proton Authenticator & 2FA

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

Head to head
About

Auth Authenticator

Secure your online accounts with this Two-Factor Authentication (2FA) app. It generates time-based one-time passwords (TOTP) and offers encrypted backups, multi-device sync, and offline access. Protect your accounts from unauthorized access with robust security features.

Highlights
  • Encrypted iCloud Backup
  • Apple Watch Support
  • Multi-Device Sync
  • Offline Access
  • Biometric & PIN Lock
  • Quick Setup
  • TOTP Security
Features
Read full description

Auth Authenticator – Secure 2FA with iCloud Backup & Apple Watch Support Strengthen your account protection with Auth Authenticator, the fast, reliable, and secure Two-Factor Authentication (2FA) app trusted by thousands of users. Generate time-based one-time passwords (TOTP) and keep your online accounts safe from unauthorized access. Whether you're securing your Google, Facebook, Instagram, Microsoft, Amazon, or other important accounts, Auth Authenticator offers an easy, secure, and convenient way to manage all your 2FA codes. Powerful Features of Auth Authenticator: * iCloud Encrypted Backup 
Securely store your 2FA accounts with automatic iCloud backup. Recover your codes anytime, even if you lose or change your device. * Apple Watch Support 
View your verification codes right from your Apple Watch — instant access without pulling out your phone. * Multi-Device Sync 
 Seamlessly sync your 2FA accounts across multiple Apple devices, ensuring you’re always connected. * Offline Access Anywhere
 Generate one-time passwords even when offline or traveling — no internet connection required. * Quick & Easy Setup
 Add accounts via QR code scan or manual key entry in seconds. * Biometric & PIN Lock Protection 
Keep your codes safe with Face ID, Touch ID, or a secure PIN. * Works with All Popular Platforms
Compatible with Google, Facebook, Instagram, Microsoft, Amazon, Twitter, LinkedIn, GitHub, Dropbox, and any app or service supporting TOTP 2FA. * Time-Based One-Time Password (TOTP) Security 
Industry-standard TOTP algorithm ensures your codes refresh automatically every 30 seconds for strong, reliable protection. * No Ads, Fully Private 
Ad-free, privacy-first design — your information stays with you. Why risk your accounts?
Get Auth Authenticator today — the trusted, feature-packed 2FA app with iCloud Backup, Apple Watch support, and multi-device sync. Information About Subscription You can cancel your subscription or free trial anytime by cancelling your subscription through your iTunes account settings, or it will automatically renew. This must be done 24 hours before the end of the free trial or any subscription period to avoid being charged. Subscription with a free trial period will automatically renew to a paid subscription. Please note: any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period. Subscription payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term. For more information, please see our Privacy Policy and Terms of Use. Terms of Use: https://sites.google.com/view/auth-terms/ Privacy Policy: https://sites.google.com/view/auth-privacy/

About

Proton Authenticator & 2FA

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

Auth Authenticator4 screens
Proton Authenticator & 2FA4 screens

Verdict

The call

The clearest difference is in-app purchases: Proton Authenticator & 2FA at none against Auth Authenticator's 3. Proton Authenticator & 2FA also leads on update cadence (weekly vs every 5 months). On price, rating, review sentiment and ratings volume 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. Auth Authenticator sells 3 in-app purchases, starting at $9.99 per 7 days. Proton Authenticator & 2FA asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for Auth Authenticator against 4.4 for Proton Authenticator & 2FA. Both are backed by a comparable volume of ratings — 213 and 314 respectively. Written reviews split almost evenly too, at 57% and 58% positive.

UpkeepUpdate frequency

Auth Authenticator ships an update every 5 months, Proton Authenticator & 2FA weekly. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

Scorecard3 real differences · 7 level
Auth Authenticator versus Proton Authenticator & 2FA: the parameters behind the verdict, then further details
ParameterAuth AuthenticatorProton Authenticator & 2FA
PriceFreeFree
Rating4.4 (213 ratings)4.4 (314 ratings)
Positive reviews56.8% of reviews57.6% of reviews — better
Number of ratings213314 — better
Update frequencyEvery 5 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Apple Watch
Requires iOS16 — better17.0
Further details — not scored
Size20 MB120 MB
Age rating4+4+
DeveloperAppios BilisimProton AG

Customer experience

Auth Authenticator

All ratings213 ratings
Positive86.4%
Neutral3.8%
Negative9.9%
Written reviews44 reviews
Positive56.8%
Neutral6.8%
Negative36.4%

Proton Authenticator & 2FA

All ratings314 ratings
Positive82.8%
Neutral6.7%
Negative10.5%
Written reviews255 reviews
Positive57.6%
Neutral19.2%
Negative23.1%

Bugs and requests

Auth Authenticator

Not enough reviews yet to summarise bugs or requests.

Proton Authenticator & 2FA

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

3 purchases

Auth Authenticator

Subscriptions3
  • Weekly Subscription Plans3 Days trial$9.997 Days
  • Monthly Subscription Plans$14.991 Month
  • Yearly Subscription Plans3 Days trial$49.991 Year
None

Proton Authenticator & 2FA

No in-app purchases

Questions

Is Auth Authenticator free?
Auth Authenticator is free to download, with in-app purchases available.
Is Proton Authenticator & 2FA free?
Proton Authenticator & 2FA is free to download, with no in-app purchases.
Which has better reviews, Auth Authenticator or Proton Authenticator & 2FA?
Auth Authenticator and Proton Authenticator & 2FA are both rated 4.4 out of 5 on the App Store, from 213 and 314 ratings respectively.
Do Auth Authenticator or Proton Authenticator & 2FA have ads?
Neither Auth Authenticator nor Proton Authenticator & 2FA shows ads.
Which is updated more often, Auth Authenticator or Proton Authenticator & 2FA?
Auth Authenticator ships an update every 5 months, and Proton Authenticator & 2FA weekly. Most recently, Auth Authenticator was updated on October 18, 2026 and Proton Authenticator & 2FA on October 19, 2026.

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