Lumo AI

Lumo by Proton is a simple, privacy-focused AI chat app for Android that lets you ask anything without worrying about your data being shared or spied on. Created by the Proton team behind secure email, VPN, and storage used by over 100 million people, it helps you get quick answers, boost productivity, and stay informed—all while encrypting your chats so only you can read them. No tracking, no logs, just helpful AI you can trust on your phone.

Key Features

• Zero-Access Encryption: Your conversations are locked with top-notch security that even Proton can't access, keeping everything private.
• Voice Input and File Uploads: Speak your questions or upload photos/files for analysis, with smooth speech-to-text that works great.
• Ghost Mode: Turn on this to make chats vanish forever when you close them—no history saved anywhere.
• Web Search Option: Get fresh info from privacy-friendly sources when you need real-time updates.

​​Use Cases

• Learning about history, health, or hobbies through clear, detailed chats without privacy risks.
• Rewriting emails, summarizing docs, or getting shopping tips on the go.
• Brainstorming ideas or coding help securely, perfect for students or beginners.