Read the web.Keep the good parts.Ask anything later.

A private iOS browser with a knowledge panel built in. A local model answers from pages you’ve read, cites its sources, and never sends a thing to a server.

Download for iPhoneSource on GitHub
Lumen home
Knowledge at its best

A knowledge panel,
built in.

Open any page. Lumen extracts, embeds, and classifies quietly in the background. Ask questions later, or walk the library you built by reading.

Knowledge panel answering a real question
Ask anything

The answers come from
what you’ve read.

Drag to see the panel fill with real questions, grounded answers, and the pages they came from. The model will always give you an answer grounded in the history you collect overtime.

Ask panel answering questions with sources
Empty Ask panel with sparkle glyph
Principles

What we won’t budge on.

Two things Lumen will always be. Everything else can change as the project grows.

  • Open-source
  • Private and on-device