Privacy Policy for Lumen

lumen_policy.txt

# Lumen App Privacy Policy

**Last updated: April 21, 2026**

## Overview

Lumen is a personal AI agent application developed by Charlie Knudsen (Android package `us.charliek.lumen`). This policy describes how the app collects, uses, and handles your information.

## Information We Collect

### Conversation Data

Text messages and conversation history are stored on servers to provide continuity between sessions, associated with user accounts.

### SmartThings OAuth Tokens

When a user connects a SmartThings account, the resulting access and refresh tokens are stored so the app can read device state and send commands on the user's behalf. Tokens are refreshed automatically and can be revoked at any time from your SmartThings account.

### Device Information

"Basic device information (OS version, device model) may be collected for debugging and improving the service."

## How We Use Your Information

- **Conversations**: Stored to provide conversation history, and sent to third-party language model providers to generate responses.
- **SmartThings tokens**: Used to read and control connected devices on your behalf.
- **Device info**: Used solely for debugging and service reliability.

## Third-Party Services

The application relies on:
- Neon (managed PostgreSQL database hosting)
- LiveKit Cloud (real-time transport)
- Fireworks AI (language model processing)
- Perplexity (search / knowledge retrieval)
- SmartThings (IoT device integration via OAuth)

These services operate under their own privacy policies.

## Data Storage and Security

"Your data is stored on secured servers. We use industry-standard practices to protect your information."

## Data Deletion

Users may request account and data deletion by contacting charlie.knudsen@gmail.com.

## Children's Privacy

"Lumen is not intended for use by children under 13. We do not knowingly collect information from children."

## Policy Updates

The policy may be updated; changes are reflected by updating the date at the top.

## Contact

charlie.knudsen@gmail.com