Welcome
Lumen is an iPhone browser with a private library of what you read, and a small model on the phone to answer questions about it.
Lumen is a web browser for iPhone. As you read, it saves the pages you spend time on into a library on your phone, sorted by topic and by website, and a small language model running on the device answers questions from what you saved. Nothing you save or ask goes to a server, and there is no account to create.
These pages cover getting the app, what happens the first time you open it, how the library and Ask work, what the app sends over the network, and how the code fits together. Start with whichever one matches your question, or read them in the order of the sidebar.
Installation
Get Lumen from the App Store, or build it from source in Xcode.
First run
What you see when you first open the app, and when the model downloads.
Knowledge panel
How Ask answers from your library, and how the library is organized.
Privacy
What leaves the phone, and what stays on it.
Architecture
How the browser, the database, and the model fit together.
Contributing
The checks a change has to pass, and how to send one.
Support
Where to report a problem or ask for help.