# EteSync vs Tuta Calendar

The clearest difference is rating: Tuta Calendar at 4.6 against EteSync's 3.0. Tuta Calendar also leads on review sentiment (57% vs 20%) and update cadence (weekly vs every 3 weeks). EteSync's advantage is in-app purchases (none vs 4) and iOS requirement (10.0 vs 16.0). On price, ads and device support there is nothing between them.

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

Tuta Calendar holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Tuta Calendar has 162 ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 20% of EteSync's written reviews are positive against 57% of Tuta Calendar's.

EteSync ships an update every 3 weeks, Tuta Calendar weekly. The most recent releases landed on October 14, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | EteSync | Tuta Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (20 ratings)](https://appshunter.io/ios/app/etesync/id1489574285/reviews) | **[4.6 (162 ratings)](https://appshunter.io/ios/app/tuta-calendar-secure-planner/id6657977811/reviews)** |
| Number of ratings | 20 | **162** |
| Positive reviews | 20.0% of reviews | **56.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 45 MB | 45 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EteSync Ltd](https://appshunter.io/developer/1489574284) | [Tutao GmbH](https://appshunter.io/developer/922429608) |

## What reviewers say

### EteSync

[App page](https://appshunter.io/ios/app/etesync/id1489574285)

Securely sync your contacts, calendars, and tasks across devices. This app provides a privacy-respecting synchronization solution with a full history of your data, allowing for restoration and access to past versions.

**Highlights:** Secure data synchronization, Contacts, calendars, and tasks sync, Privacy-respecting, Open-source client and server, Full data history and restore, Easy to use setup

**Features:** macOS Compatibility

**In-app purchases:** none


### Tuta Calendar

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

This secure calendar app offers end-to-end encryption to protect your events and reminders. It features a user-friendly interface, cross-device syncing, and smart reminders, with a free plan and optional premium upgrades.

**Highlights:** Quantum-safe end-to-end encryption, Zero tracking and zero-knowledge architecture, Secure event sharing, Cross-device syncing, Multiple calendar views, Smart event reminders, Offline access

**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)


## Frequently asked questions

### Is EteSync free?

EteSync is free to download, with no in-app purchases.

### Is Tuta Calendar free?

Tuta Calendar is free to download, with in-app purchases available.

### Which has better reviews, EteSync or Tuta Calendar?

Tuta Calendar is rated higher. EteSync averages 3.0 out of 5 from 20 ratings, while Tuta Calendar averages 4.6 from 162 ratings.

### Do EteSync or Tuta Calendar have ads?

Neither EteSync nor Tuta Calendar shows ads.

### Which is updated more often, EteSync or Tuta Calendar?

EteSync ships an update every 3 weeks, and Tuta Calendar weekly. Most recently, EteSync was updated on October 14, 2026 and Tuta Calendar on October 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*