Request for a native macOS application. Currently, the web-only experience forces reliance on browser-based workarounds that introduce privacy risks and workflow friction. A native app would eliminate browser extension vulnerabilities and provide a seamless, secure creative workspace.

I chose Lumo specifically for its zero-access encryption and no-logs policy. However, the lack of a native macOS app creates significant barriers:

1. Browser Extension Vulnerabilities: Even with a clean browser profile, extensions with "read page content" permissions pose a theoretical risk to sensitive creative work.
2. Workflow Friction: Tab switching, bookmark clutter, and browser notifications interrupt creative flow.
3. Missing Native Features: No macOS-native shortcuts, widgets, or system integration (e.g., Spotlight search, keyboard shortcuts, menu bar access).
4. Inconsistent Experience: iOS/iPadOS has native apps, but Mac users are left with a web-only solution despite being a core Proton platform.

Why This Matters? Mac is the dominant platform for creative professionals. By excluding a native Mac app, Proton is effectively excluding a major segment of privacy-conscious users who need Lumo most.

Specific Requests:

1. Native macOS App (.dmg/.app): A standalone application that runs independently of Safari/Chrome, eliminating browser extension risks.
2. macOS Integration:
Keyboard shortcuts (Cmd+K for quick actions)
Menu bar access for quick prompts
Widgets for iOS/Mac (like the iOS widget mentioned in Proton's documentation)
Spotlight search integration
3. Offline Caching: Ability to access recent chat history locally (encrypted) when internet is unavailable.
4. Push Notifications: Native macOS notifications for Lumo Plus features or important updates.

Comparison to Competitors? Most AI assistants (ChatGPT, Claude, etc.) offer native desktop apps for Mac. Proton's privacy-first positioning should lead in this area, not lag.

Why Now? With Lumo's growth and Proton's commitment to the "EuroStack" initiative, a native Mac app would demonstrate leadership in privacy-first AI tools for professional users. It would also align with Proton's existing native apps (Mail, Drive, Pass, VPN) that all have macOS versions.

Impact? A native Mac app would:
1. Eliminate browser-based attack vectors for sensitive work
2. Improve creative workflow efficiency
3. Attract professional writers and enterprises to the Proton ecosystem
4. Complete the cross-platform parity (iOS, Android, Mac, Web)

I should renew my subscription for my Unlimited version in the next days. It does not make much sense to me to do so (nor for the other members of my team), if Lumo (the full version; named "+" or, in future, whatever) is not available in macOS14.

Thank you for this suggestion. I understand the appeal of a local Lumo application with indexing capabilities. However, I would like to offer a cautionary perspective for those who prioritize privacy, censorship resistance, and security.

Platform Considerations:

On Windows 11, Chrome OS, and macOS, implementing such a feature would introduce significant risk vectors due to:

Comprehensive telemetry and user behavior data collection inherent to these operating systems

Cloud synchronization services that propagate data—and potential compromises—across all linked devices

Single point of failure: if one device is compromised, the entire synchronized ecosystem becomes vulnerable

Indexing local email and files would create a concentrated repository of sensitive information. On closed platforms with extensive background data collection, this concentration amplifies exposure rather than mitigating it.

Alternative for Those Seeking This Functionality:

For users who prioritize convenience over privacy, ChatGPT already offers this type of integration across iOS devices and Windows desktops. However, I would note that such integrations enable extensive data collection on user behaviors, files and conversations that can be used to profile and or restrict and control user behaviors, restrict access to applications and services, modify system functionality and modify or disable user privacy and security preferences settings and aggregate sensitive and proprietary information about your activities. File indexing and user behavior data can then be used to write comprehensive XML file and app blocking scripts on your desktop. And if you are a business or developer, if could expose proprietary business data and confidential files.

Recommendation:

If Proton were to develop a local Lumo application, I would strongly advocate for:

Linux-first development, where telemetry and background data collection are minimal or nonexistent.

Complete isolation from cloud synchronization services
Local-only processing with no external data transmission, collection or sharing
Optional rather than default indexing features
Specific user privacy controls and no OS telemetry and or data collection

A privacy-first approach must account for the host operating system's data practices with clear data collection transparency, not just the application's own architecture.

Now, integrating Lumo into the Proton Mail application as a separate tab so that we do not have use a web browser and re-login again, and to prevent web browsers, third-parties and social media from tracking our conversation URL and session ID's would be of value.

Would be cool, with maximum security and confidentiality features of course :)

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I want this too, it'd be useful to have it as an app

I use Lumo as a PWA as someone else mentioned already, but a native Linux app would be killer.

Note that it is installable as a PWA

If they make it a similar product to M$ Copilot thatd be really cool actually but itd be a security nightmare to keep up to date and have everything be secure (as with the actual Copilot, but at least proton would *genuinely* try their best as opposed to what Microsoft are doing)