# Periscope by Duet vs Proton Authenticator & 2FA

The clearest difference is review sentiment: Periscope by Duet at 100% against Proton Authenticator & 2FA's 58%. Periscope by Duet also leads on rating (5.0 vs 4.6). Proton Authenticator & 2FA's advantage is in-app purchases (none vs 2) and ratings volume (514 vs 4). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Periscope by Duet sells 2 in-app purchases, starting at $2.99 per month. Proton Authenticator & 2FA asks for nothing beyond the download.

Periscope by Duet holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Proton Authenticator & 2FA has 514 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of Periscope by Duet's written reviews are positive against 58% of Proton Authenticator & 2FA's.

Periscope by Duet ships an update every 3 weeks, Proton Authenticator & 2FA weekly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Periscope by Duet | Proton Authenticator & 2FA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/periscope-by-duet/id1517672689/reviews)** | [4.6 (514 ratings)](https://appshunter.io/ios/app/proton-authenticator-and-2fa/id6741758667/reviews) |
| Number of ratings | 4 | **514** |
| Positive reviews | **100.0% of reviews** | 57.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Subscription | **Free** |
| Size | 37 MB | 120 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Duet, Inc.](https://appshunter.io/developer/935754063) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### Periscope by Duet

[App page](https://appshunter.io/ios/app/periscope-by-duet/id1517672689)

Access your home internet securely from anywhere in the world. This app provides end-to-end encryption and smart connectivity to bypass network restrictions, allowing you to reach your home devices and maintain privacy on public Wi-Fi.

**Highlights:** Connect to home network globally, WireGuard protocol, End-to-end encryption, Smart connectivity for restrictive networks, Real-time connection stats, Simple setup

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Periscope Monthly | $2.99 | per month |
| Periscope | $19.99 | per year |


### 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


## Frequently asked questions

### Is Periscope by Duet free?

Periscope by Duet 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, Periscope by Duet or Proton Authenticator & 2FA?

Periscope by Duet is rated higher. Periscope by Duet averages 5.0 out of 5 from 4 ratings, while Proton Authenticator & 2FA averages 4.6 from 514 ratings.

### Do Periscope by Duet or Proton Authenticator & 2FA have ads?

Neither Periscope by Duet nor Proton Authenticator & 2FA shows ads.

### Which is updated more often, Periscope by Duet or Proton Authenticator & 2FA?

Periscope by Duet ships an update every 3 weeks, and Proton Authenticator & 2FA weekly. Most recently, Periscope by Duet was updated on October 24, 2026 and Proton Authenticator & 2FA on October 28, 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.*