Comparison

Proton Authenticator vs EventAI One

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

Head to head
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

About

EventAI One

Features
Read full description

Tired of manually typing school schedules, party invitations, and event flyers into your calendar? EventAI One does it for you — in seconds. Just snap a photo, import a PDF, or paste text. EventAI One instantly extracts the title, date, time, and location. Review the details, tweak if needed, and add everything to your calendar in one tap. The original photo or PDF is saved right inside the event, so you always have the context you need — no hunting for that flyer later. EventAI One works with your device's built-in calendars, so setup is just one permission tap and you're ready to go. Whether it's your kid's school concert, a dentist reminder buried in a PDF, or a poster you spotted on the street — EventAI One turns any event info into a calendar entry before you've put your phone away. No more missed events. Just snap, review, and go.

Screenshots

Proton Authenticator4 screens
EventAI One3 screens

Verdict

The call

The clearest difference is in-app purchases: Proton Authenticator at none against EventAI One's 2. Proton Authenticator also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement 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. EventAI One sells 2 one-off in-app purchases. Proton Authenticator asks for nothing beyond the download.

UpkeepUpdate frequency

Proton Authenticator ships an update weekly, EventAI One every 6 days. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

Scorecard2 real differences · 8 level
Proton Authenticator versus EventAI One: the parameters behind the verdict, then further details
ParameterProton AuthenticatorEventAI One
PriceFreeFree
Rating4.4 (242 ratings) — better—
Positive reviews55.9% of reviews—
Number of ratings242 — better—
Update frequencyWeeklyEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size119 MB70 MB
Age rating4+4+
DeveloperProton AGSebastien Roch

Bugs and requests

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

EventAI One

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Proton Authenticator

No in-app purchases

2 purchases

EventAI One

One-time2
  • Starter pack$2.99
  • Power pack$8.99

Questions

Is Proton Authenticator free?
Proton Authenticator is free to download, with no in-app purchases.
Is EventAI One free?
EventAI One is free to download, with in-app purchases available.
Do Proton Authenticator or EventAI One have ads?
Neither Proton Authenticator nor EventAI One shows ads.
Which is updated more often, Proton Authenticator or EventAI One?
Proton Authenticator ships an update weekly, and EventAI One every 6 days. Most recently, Proton Authenticator was updated on October 16, 2026 and EventAI One on October 14, 2026.

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