Comparison

EteSync Notes vs Lumo AI by Proton

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

EteSync Notes

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
Read full description

EteSync is a secure and privacy respecting note taking application. In order to use this application you need to have an EteSync account, either on an existing server or your own (it's free and open source). Easy to Use =========== EteSync is very easy to use, you just put in your credentials and the app is ready to use. Secure & Open ============ EteSync is secure and respects your privacy. Don't believe us? You shouldn't, just verify yourself, both the client and server are open source. Full History ========= A full history of your data is saved in a change journal which means your data is never lost, even if deleted, and you can always restore, revert and access past versions of your data.

About

Lumo AI by Proton

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
Read full description

Lumo is a zero-access encrypted AI assistant that keeps every conversation private. Your data is never logged, shared, or used to train models. Your chats are yours, and yours alone. Built by Proton, the privacy brand trusted by over 100 million people and the team behind Proton Mail, VPN, Drive, and Pass. THOUGHTFUL HELP FOR ANY TASK Lumo handles everything from quick questions to more complex work. Choose Fast for quick answers or Thinking for multi-step reasoning. FAST, POWERFUL WEB SEARCH Get precise, real-time answers in seconds. Lumo cites live sources so you can verify facts, dig deeper, and stay current on news, events, financial data, and more. CREATE AND REFINE IMAGES AND FILES Work with images and files just by telling Lumo what you need, from generating and editing images to analyzing documents. Connect your Proton Drive account for seamless access to stored files. AI THAT EVOLVES OVER TIME Lumo gets better every time you use it. Memory retains context and preferences across sessions, and you can set tones and styles to get the exact Lumo experience you want. STAY PRODUCTIVE AND ORGANIZED Projects give you dedicated encrypted spaces for tasks that span multiple chats, files, and instructions, while Custom Lumos let you create assistants tailored for specific tasks. Switch between light and dark modes for a more comfortable experience throughout the day. GHOST MODE For conversations where you want maximum privacy, choose Ghost Mode. Chats are instantly deleted once you close them for greater peace of mind. PRIVACY YOU CAN VERIFY Lumo is founded on zero-access encryption with no server-side chat logs, and never uses your data for profit or model training. Like all Proton products, Lumo is built and hosted in Europe and is fully open-source. Lumo helps you stay productive, curious, and informed — without ever compromising your privacy. Start a confidential chat for free today. For more information, visit our website: https://lumo.proton.me/about Terms of service: https://lumo.proton.me/legal/terms Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Our open-source code base: https://github.com/ProtonLumo/ios-lumo

Screenshots

EteSync Notes4 screens
Lumo AI by Proton4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
EteSync Notes versus Lumo AI by Proton: the parameters behind the verdict, then further details
ParameterEteSync NotesLumo AI by Proton
PriceFreeFree
Rating3.0 (2 ratings)3.8 (525 ratings) — better
Positive reviews100.0% of reviews — better45.5% of reviews
Number of ratings2525 — better
Update frequencyWeekly — betterEvery 11 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better17.6
Further details — not scored
Size21 MB96 MB
Age rating4+4+
DeveloperEteSync LtdProton AG

Customer experience

EteSync Notes

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Lumo AI by Proton

All ratings525 ratings
Positive66.5%
Neutral11.0%
Negative22.5%
Written reviews567 reviews
Positive45.5%
Neutral18.5%
Negative36.0%

Bugs and requests

EteSync Notes

Not enough reviews yet to summarise bugs or requests.

Lumo AI by Proton

Reported bugs

2 issues
  • Slow sign-in page
  • Lack of real-time data access

Requested features

5 requests
  • 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

In-app purchases

None

EteSync Notes

No in-app purchases

2 purchases

Lumo AI by Proton

Subscriptions2
  • Lumo Plus (1 month)$12.991 Month
  • Lumo Plus (12 months)$119.991 Year

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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