# Pi Epsilon vs Proton Authenticator

The clearest difference is rating: Pi Epsilon at 5.0 against Proton Authenticator's 4.4. Pi Epsilon also leads on iOS requirement (15.0 vs 17.0). Proton Authenticator's advantage is update cadence (weekly vs every 6 months) and ratings volume (242 vs 4). 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.

Pi Epsilon holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Proton Authenticator has 242 ratings behind it against 4, so its average is the more settled of the two.

Pi Epsilon ships an update every 6 months, Proton Authenticator weekly. The most recent releases landed on October 4, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Pi Epsilon | Proton Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/pi-epsilon/id1594236510/reviews)** | [4.4 (242 ratings)](https://appshunter.io/ios/app/proton-authenticator/id6741758667/reviews) |
| Number of ratings | 4 | **242** |
| Positive reviews | — | 55.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | Free |
| Size | 147 MB | 119 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Chesapeake International Consulting, LLC](https://appshunter.io/developer/1589725776) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### Pi Epsilon

[App page](https://appshunter.io/ios/app/pi-epsilon/id1594236510)

A decentralized, anonymous, and end-to-end encrypted communication platform offering voice, text, video, and group calls. It provides robust security features and full user control over the server environment, bypassing third-party providers.

**Highlights:** Decentralized and anonymous communication, End-to-end encryption, Voice, text, and video calls, Group video conferencing, User-controlled server hosting, Decoy obfuscation tools

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Pi Epsilon free?

Pi Epsilon 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, Pi Epsilon or Proton Authenticator?

Pi Epsilon is rated higher. Pi Epsilon averages 5.0 out of 5 from 4 ratings, while Proton Authenticator averages 4.4 from 242 ratings.

### Do Pi Epsilon or Proton Authenticator have ads?

Neither Pi Epsilon nor Proton Authenticator shows ads.

### Which is updated more often, Pi Epsilon or Proton Authenticator?

Pi Epsilon ships an update every 6 months, and Proton Authenticator weekly. Most recently, Pi Epsilon was updated on October 4, 2026 and Proton Authenticator on October 16, 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.*