# Privacy Policy for Cluster Headache Tracker

URL: https://clusterheadachetracker.com/privacy-policy

> Privacy policy for Cluster Headache Tracker, including username-only accounts, health log storage, sharing controls, export rights, and data handling.

## Privacy Summary

Users provide a username and headache log data.
The app does not require email addresses for accounts.
Users can export data as CSV and control temporary sharing links.

## Data Use

Data is used to provide headache tracking, charts, reports, and product improvements.
Personal logs are not sold and are not included in AI-visible content files.

## Topics

- Privacy-focused health tracking
- Headache diary
- Open-source health software