# Proton Authenticator & 2FA vs EventAI One

The clearest difference is in-app purchases: Proton Authenticator & 2FA at none against EventAI One's 2. Proton Authenticator & 2FA also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. EventAI One sells 2 one-off in-app purchases. Proton Authenticator & 2FA asks for nothing beyond the download.

Proton Authenticator & 2FA ships an update weekly, EventAI One every 6 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Proton Authenticator & 2FA | EventAI One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (314 ratings)](https://appshunter.io/ios/app/proton-authenticator-and-2fa/id6741758667/reviews)** | — |
| Number of ratings | **314** | — |
| Positive reviews | 57.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Free | — |
| Size | 120 MB | 70 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [Sébastien Roch](https://appshunter.io/developer/488898559) |

## What reviewers say

### Proton Authenticator & 2FA

[App page](https://appshunter.io/ios/app/proton-authenticator-and-2fa/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


### EventAI One

[App page](https://appshunter.io/ios/app/eventai-one/id6761818187)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter pack | $2.99 | one-time |
| Power pack | $8.99 | one-time |


## Frequently asked questions

### Is Proton Authenticator & 2FA free?

Proton Authenticator & 2FA 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 & 2FA or EventAI One have ads?

Neither Proton Authenticator & 2FA nor EventAI One shows ads.

### Which is updated more often, Proton Authenticator & 2FA or EventAI One?

Proton Authenticator & 2FA ships an update weekly, and EventAI One every 6 days. Most recently, Proton Authenticator & 2FA was updated on October 19, 2026 and EventAI One on October 14, 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.*