# Tuta Calendar vs Proton Authenticator & 2FA

The clearest difference is in-app purchases: Proton Authenticator & 2FA at none against Tuta Calendar's 4. Proton Authenticator & 2FA also leads on ratings volume (741 vs 168). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Tuta Calendar sells 4 in-app purchases, starting at $3.99 per month. Proton Authenticator & 2FA asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Tuta Calendar against 4.6 for Proton Authenticator & 2FA. Both are backed by a comparable volume of ratings — 168 and 741 respectively. Written reviews split almost evenly too, at 58% and 58% positive.

Both ship on a similar rhythm, roughly weekly. Both last shipped on November 8, 2026.

## The numbers

| Metric | Tuta Calendar | Proton Authenticator & 2FA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (168 ratings)](https://appshunter.io/ios/app/tuta-calendar-secure-planner/id6657977811/reviews) | **[4.6 (741 ratings)](https://appshunter.io/ios/app/proton-authenticator-and-2fa/id6741758667/reviews)** |
| Number of ratings | 168 | **741** |
| Positive reviews | **57.7% of reviews** | 57.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 46 MB | 120 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Tutao GmbH](https://appshunter.io/developer/922429608) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### Tuta Calendar

[App page](https://appshunter.io/ios/app/tuta-calendar-secure-planner/id6657977811)

This app offers a secure, end-to-end encrypted calendar to protect your privacy. It provides essential planning tools like recurring events and multiple views, with seamless integration for privacy-conscious users.

**Highlights:** Quantum-safe end-to-end encryption, Zero tracking and data sharing, Sync across mobile, web, and desktop, Recurring and external calendar sync, Multiple calendar views, Offline access, Secure event sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Revolutionary (Monthly) | $3.99 | per month |
| Legend (Monthly) | $9.99 | per month |
| Revolutionary (Yearly) | $39.99 | per year |
| Legend (Yearly) | $99.99 | per year |

**What reviewers like**

- 🔒 Privacy and security focused
- 👍 Streamlined and minimalist design
- 🔄 Calendar subscriptions work well
- ✨ Good color schemes and views
- ✅ Private alternative to big tech

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- ⚠️ Requires account/login
- 📅 Widget not working/limited
- ❌ No watch app support
- ⏳ Slow loading/reloading events

**Reported bugs**

- App crashes frequently
- Widget is not working or is blank
- Calendar events not saving or changes not saving
- App logs out automatically and shows invalid credentials
- Double reminders for appointments

**Requested features**

- App for the Watch
- Icon shows current date
- Ability to see holidays marked
- Import from Apple calendar
- Adjustable app opening view (e.g., month view)


### 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 Tuta Calendar free?

Tuta Calendar 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, Tuta Calendar or Proton Authenticator & 2FA?

Proton Authenticator & 2FA is rated higher. Tuta Calendar averages 4.6 out of 5 from 168 ratings, while Proton Authenticator & 2FA averages 4.6 from 741 ratings.

### Do Tuta Calendar or Proton Authenticator & 2FA have ads?

Neither Tuta Calendar nor Proton Authenticator & 2FA shows ads.

### Which is updated more often, Tuta Calendar or Proton Authenticator & 2FA?

Tuta Calendar ships an update weekly, and Proton Authenticator & 2FA weekly. Most recently, Tuta Calendar was updated on November 8, 2026 and Proton Authenticator & 2FA on November 8, 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.*