# Proton Calendar vs Notesnook

The clearest difference is rating: Notesnook at 4.7 against Proton Calendar's 4.1. Notesnook also leads on review sentiment (79% vs 41%) and update cadence (every 8 days vs every 5 weeks). Proton Calendar's advantage is monetization model (free vs free with in-app purchases). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Proton Calendar sells 2 one-off in-app purchases and Notesnook sells 17 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Notesnook holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 1.6K and 688 respectively. Written reviews point the same way: 41% of Proton Calendar's written reviews are positive against 79% of Notesnook's.

Proton Calendar ships an update every 5 weeks, Notesnook every 8 days. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Proton Calendar | Notesnook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (1.6K ratings)](https://appshunter.io/ios/app/proton-calendar-secure-events/id1514709943/reviews) | **[4.7 (688 ratings)](https://appshunter.io/ios/app/notesnook-private-notepad/id1544027013/reviews)** |
| Number of ratings | **1.6K** | 688 |
| Positive reviews | 40.7% of reviews | **78.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 185 MB | 82 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [Streetwriters LLC](https://appshunter.io/developer/1536533660) |

## What reviewers say

### Proton Calendar

[App page](https://appshunter.io/ios/app/proton-calendar-secure-events/id1514709943)

This app helps you manage your schedule with privacy in mind. It offers various viewing options, reminders, and recurring event creation. All your data is protected by end-to-end encryption and strict Swiss privacy laws, ensuring your personal information is not tracked or harvested.

**Highlights:** Agenda and day view, View and reply to invites, Automatic event addition from email, Light and dark mode, Multiple reminders, Recurring events, Cross-device sync

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mail Plus (1 year) | $59.99 | one-time |
| Proton Unlimited | $149.99 | one-time |

**What reviewers like**

- 🚀 Intuitive interface
- 🔒 Secure and private
- 👍 Good integration with Proton suite
- 👍 Visually appealing design

**What reviewers complain about**

- 🐛 Slow performance and crashes
- 🔍 Lacking search functionality
- 📅 Missing advanced calendar views (week, month)
- 🔗 Limited integration with other calendars

**Reported bugs**

- Issues with time zone settings
- Notifications not working reliably
- Inability to edit shared events

**Requested features**

- Widgets for quick access
- Ability to invite and share calendars with others
- Support for importing/exporting calendar data
- Customization options (colors, alerts, etc.)
- iPad-optimized version


### Notesnook

[App page](https://appshunter.io/ios/app/notesnook-private-notepad/id1544027013)

This open-source app offers secure, encrypted note-taking and organization across all your devices. It features a robust editor, to-do lists, and a private journal with advanced security to protect your personal information.

**Highlights:** Military-grade encryption, Cross-platform synchronization, To-do lists and task management, Private journal with media support, Rich text and Markdown editor, Notebook organization, App lock with fingerprint support

**Features:** Vision Pro support

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notesnook Pro | $0.99 | per month |
| Notesnook Essential Plan | $1.99 | per month |
| Notesnook Pro | $2.49 | per month |
| Notesnook Pro Plan | $2.99 | per month |
| Notesnook Pro | $4.49 | per month |
| Notesnook Pro | $4.49 | per month |
| Notesnook Pro Plan | $6.99 | per month |
| Notesnook Believer Plan | $8.99 | per month |
| Notesnook Pro | $9.99 | per year |
| Notesnook Essential Plan | $19.99 | per year |
| Notesnook Pro | $24.99 | per year |
| Notesnook Pro Plan | $29.90 | per year |
| Notesnook Pro Yearly | $49.99 | per year |
| Notesnook Pro | $49.99 | per year |
| Notesnook Pro | $49.99 | per year |
| Notesnook Pro Plan | $69.99 | per year |
| Notesnook Believer Plan | $89.99 | per year |

**What reviewers like**

- 🚀 Fast and efficient
- 🔒 Secure and private
- 👍 Clean and intuitive UI
- 👍 Cross-platform compatibility
- 👍 Generous free tier

**What reviewers complain about**

- 🐛 Sync and login issues
- 🐛 Buggy and crashes
- 💰 Expensive premium tier
- 🔒 Lack of free encryption features

**Reported bugs**

- Crashes on launch on older iOS devices
- Sync issues leading to data loss
- Unreliable login and verification process

**Requested features**

- Improved search functionality
- Reminders and calendar integration
- Handwriting and drawing support
- Multilingual support
- Improved table and spreadsheet features


## Frequently asked questions

### Is Proton Calendar free?

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

### Is Notesnook free?

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

### Which has better reviews, Proton Calendar or Notesnook?

Notesnook is rated higher. Proton Calendar averages 4.1 out of 5 from 1.6K ratings, while Notesnook averages 4.7 from 688 ratings.

### Do Proton Calendar or Notesnook have ads?

Neither Proton Calendar nor Notesnook shows ads.

### Which is updated more often, Proton Calendar or Notesnook?

Proton Calendar ships an update every 5 weeks, and Notesnook every 8 days. Most recently, Proton Calendar was updated on October 30, 2026 and Notesnook on October 29, 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.*