# Lumo AI by Proton

> Private Assistant from Europe

Canonical page: [https://chrome-stats.com/d/id6746714949](https://chrome-stats.com/d/id6746714949)

## Overview

- **ID:** `id6746714949`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Proton AG
- **Category:** Productivity
- **Rating:** 3.80 / 5 (508 ratings)
- **Version:** 2.0.4
- **Last updated:** 2026-08-21
- **First published:** 2025-07-23
- **Size:** 95 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/lumo-ai-by-proton/id6746714949)
- **Website:** [https://lumo.proton.me/about](https://lumo.proton.me/about)
- **Privacy policy:** [https://lumo.proton.me/legal/privacy](https://lumo.proton.me/legal/privacy)

## Description

Meet Lumo, the privacy-first AI assistant from Proton. No tracking, no profiling, and every chat remains confidential—delivering a respectful balance of productivity and privacy.

From Proton’s privacy-focused toolkit, Lumo helps you stay productive, curious, and informed without compromising privacy. This open-source project invites transparency, with code available at https://github.com/ProtonLumo/ios-lumo. For more information, visit https://lumo.proton.me/about and review Terms of Service at https://lumo.proton.me/legal/terms.

## Rankings

- #78,477 — Overall
- #49 — copilot

## Review summary

Users praise Lumo AI for its privacy-first approach and usefulness for everyday tasks, along with the ability to include sources in responses and improved performance after updates. However, recurring issues undermine reliability: crashes and freezes, overheating, and unstable performance; inconsistent chat history syncing across devices; confusing billing/subscription behavior; clunky UI/UX with difficult history management; and occasional inaccurate or overly restricted answers. Overall, the app is valued for privacy and daily usefulness, but it still needs fixes in stability, syncing, billing clarity, and user experience.

### Pros

- Privacy-first design and strong data security
- Reliable for daily personal tasks and safe to use
- Ability to provide sources and citations for information
- Notable performance and responsiveness improvements after updates (faster composer, snappier)
- Trust in the Proton ecosystem and commitment to privacy

### Cons

- Stability and performance issues including crashes when sending, freezing, white screens, and CPU overheating
- Unreliable data synchronization across devices and chat history
- Confusing billing and subscription handling (weekly caps, credits)
- UI/UX problems including hard navigation, small fonts, and difficult history management
- Occasional inaccurate answers or overly strict guardrails limiting helpful responses

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6746714949)