Comparison

Lumo AI by Proton vs Schedule Block Builder

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

Head to head
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

About

Schedule Block Builder

Features
Read full description

Schedule Block Builder is an app with a bold, poster-like design that perfectly solves one problem: creating a weekly schedule and sharing it with anyone via a 6-digit code. No accounts, passwords, or registration needed. Simply open the app, create the schedule, and send the code through chat. The creator can make a schedule in seconds by choosing a name, their name, and an accent color, adding classes, events, and activities, and editing or deleting with a single tap. The creator can share a 6-digit code and send it through chat or say it aloud. The user enters the code and instantly sees the schedule, switches between days of the week, and all changes made by the creator appear in real-time. There are no extra buttons, just the schedule. If the creator shifts a class to a different time or changes the audience, the user will see it immediately, without updates or delays. The live connection works automatically. The app offers 6 vibrant accent colors to choose from, large typography, and thin lines. No rounded corners or pastel tones—just a clean, bold poster style that stands out from hundreds of similar apps. This app is perfect for teachers and students, tutors and learners, event organizers, coaches and sports teams, and for any group scheduling. The app is free, ad-free, and requires no registration. Simply open the app and start using it right away.

Screenshots

Lumo AI by Proton4 screens
Schedule Block Builder4 screens

Verdict

The call

The clearest difference is in-app purchases: Schedule Block Builder at none against Lumo AI by Proton's 2. Lumo AI by Proton's advantage is update cadence (every 11 days vs every 3 months). On price, ads, device support and iOS requirement 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. Schedule Block Builder asks for nothing beyond the download.

UpkeepUpdate frequency

Lumo AI by Proton ships an update every 11 days, Schedule Block Builder every 3 months. The most recent releases landed on November 11, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
Lumo AI by Proton versus Schedule Block Builder: the parameters behind the verdict, then further details
ParameterLumo AI by ProtonSchedule Block Builder
PriceFreeFree
Rating3.9 (567 ratings) — better—
Positive reviews45.9% of reviews—
Number of ratings567 — better—
Update frequencyEvery 11 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.6
Further details — not scored
Size103 MB16 MB
Age rating4+4+
DeveloperProton AGCezar Beltrao

Bugs and 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

Schedule Block Builder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Lumo AI by Proton

Subscriptions2
  • Lumo Plus (1 month)$12.991 Month
  • Lumo Plus (12 months)$119.991 Year
None

Schedule Block Builder

No in-app purchases

Questions

Is Lumo AI by Proton free?
Lumo AI by Proton is free to download, with in-app purchases available.
Is Schedule Block Builder free?
Schedule Block Builder is free to download, with no in-app purchases.
Do Lumo AI by Proton or Schedule Block Builder have ads?
Neither Lumo AI by Proton nor Schedule Block Builder shows ads.
Which is updated more often, Lumo AI by Proton or Schedule Block Builder?
Lumo AI by Proton ships an update every 11 days, and Schedule Block Builder every 3 months. Most recently, Lumo AI by Proton was updated on November 11, 2026 and Schedule Block Builder on October 28, 2026.

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