Lumi
The AI that lives on your iPhone, not in the cloud.
Private, powerful, and occasionally sarcastic. Experience the first 100% on-device AI companion that respects your data as much as you do.
Why you'll love talking to Lumi
- True Privacy: Lumi runs entirely on your device's Neural Engine. No logs, no tracking, no cloud. What you say to Lumi stays on your iPhone.
- Two Brains: Use Core for lightning-fast chats, or switch to Ascended—a powerful 4B parameter model—for deeper, more nuanced conversations.
- Real Personality: Lumi has its own personality but you can choose to change it to a 'Witty & Sarcastic' friend, an 'Executive Coach', or define your own custom persona. Lumi adapts to you.
Under the Hood
Built on Google's Gemma 3n and optimized exclusively for Apple Silicon. Lumi squeezes every drop of power from your iPhone's RAM to deliver desktop-class AI performance in your pocket.
Hand-crafted by an indie developer who believes the future of AI is personal, private, and local.
Support
Questions or feedback? Reach out via the chat widget or email support@appsbymatt.ai.