# EteSync Notes vs Lumo AI by Proton

The clearest difference is review sentiment: EteSync Notes at 100% against Lumo AI by Proton's 46%. EteSync Notes also leads on in-app purchases (none vs 2) and iOS requirement (10.0 vs 17.6). Lumo AI by Proton's advantage is rating (3.8 vs 3.0) and ratings volume (525 vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Lumo AI by Proton sells 2 in-app purchases, starting at $12.99 per month. EteSync Notes asks for nothing beyond the download.

Lumo AI by Proton holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: Lumo AI by Proton has 525 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 100% of EteSync Notes's written reviews are positive against 46% of Lumo AI by Proton's, so the app with the better star average is not the one people write more warmly about.

EteSync Notes ships an update weekly, Lumo AI by Proton every 11 days. The most recent releases landed on September 26, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | EteSync Notes | Lumo AI by Proton |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/etesync-notes/id1533806351/reviews) | **[3.8 (525 ratings)](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949/reviews)** |
| Number of ratings | 2 | **525** |
| Positive reviews | **100.0% of reviews** | 45.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 11 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 21 MB | 96 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EteSync Ltd](https://appshunter.io/developer/1489574284) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### EteSync Notes

[App page](https://appshunter.io/ios/app/etesync-notes/id1533806351)

This app offers a secure and private note-taking experience. It features a change journal for data history, allowing you to restore or revert to past versions. An EteSync account is required, which can be hosted on a free, open-source server.

**Highlights:** Secure and privacy-respecting, Open-source client and server, Full data history and change journal, Easy to use with credentials, Data restoration and versioning

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 EteSync Notes free?

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

### Is Lumo AI by Proton free?

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

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

Lumo AI by Proton is rated higher. EteSync Notes averages 3.0 out of 5 from 2 ratings, while Lumo AI by Proton averages 3.8 from 525 ratings.

### Do EteSync Notes or Lumo AI by Proton have ads?

Neither EteSync Notes nor Lumo AI by Proton shows ads.

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

EteSync Notes ships an update weekly, and Lumo AI by Proton every 11 days. Most recently, EteSync Notes was updated on September 26, 2026 and Lumo AI by Proton on October 16, 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.*