# Notesnook vs Lumo AI by Proton

The clearest difference is rating: Notesnook at 4.7 against Lumo AI by Proton's 3.9. Notesnook also leads on review sentiment (79% vs 46%) and iOS requirement (15.6 vs 17.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Notesnook sells 17 in-app purchases, starting at $0.99 per month and Lumo AI by Proton sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Notesnook holds the better App Store score, 4.7 against 3.9. Both are backed by a comparable volume of ratings — 684 and 553 respectively. Written reviews point the same way: 79% of Notesnook's written reviews are positive against 46% of Lumo AI by Proton's.

Notesnook ships an update every 8 days, Lumo AI by Proton every 11 days. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Notesnook | Lumo AI by Proton |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (684 ratings)](https://appshunter.io/ios/app/notesnook-private-notepad/id1544027013/reviews)** | [3.9 (553 ratings)](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949/reviews) |
| Number of ratings | **684** | 553 |
| Positive reviews | **78.9% of reviews** | 45.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 11 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 82 MB | 103 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Streetwriters LLC](https://appshunter.io/developer/1536533660) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### 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


### Lumo AI by Proton

[App page](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949)

This AI assistant prioritizes your privacy, offering help with productivity, curiosity, and staying informed. Developed by the team behind trusted encrypted services, it ensures your data remains secure.

**Highlights:** Privacy-first AI assistant, Boost productivity, Satisfy curiosity, Stay informed, Secure data handling

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lumo Plus (1 month) | $12.99 | per month |
| Lumo Plus (12 months) | $119.99 | per year |

**What reviewers like**

- 👍 Sophisticated knowledge base
- 🚀 Rapid evolution with quality
- 💡 Potential for vision-enabled model

**What reviewers complain about**

- 🐛 Inability to answer basic questions
- 🔒 Privacy concerns with data processing
- 🐛 Inconsistent responses
- 🐛 Frequent sign-outs
- 🐛 Dark mode issues

**Reported bugs**

- Slow sign-in page
- Lack of real-time data access

**Requested features**

- Dynamic Type support for adjustable font size
- Secure access to Proton Drive files
- Ghost mode to ensure no chat history is saved
- Intuitive history clearing option
- App mode


## Frequently asked questions

### Is Notesnook free?

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

### Is Lumo AI by Proton free?

Lumo AI by Proton is free to download, with in-app purchases available.

### Which has better reviews, Notesnook or Lumo AI by Proton?

Notesnook is rated higher. Notesnook averages 4.7 out of 5 from 684 ratings, while Lumo AI by Proton averages 3.9 from 553 ratings.

### Do Notesnook or Lumo AI by Proton have ads?

Neither Notesnook nor Lumo AI by Proton shows ads.

### Which is updated more often, Notesnook or Lumo AI by Proton?

Notesnook ships an update every 8 days, and Lumo AI by Proton every 11 days. Most recently, Notesnook was updated on October 25, 2026 and Lumo AI by Proton on October 26, 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.*