---
title: Privacy
description: What we measure on this site, and what we don't. No cookies, no personal data.
tableOfContents: false
---

This site is run as a free teaching tool, not a business that profiles its
visitors. We keep the analytics deliberately minimal.

## What we collect

We measure aggregate usage with **[Umami](https://umami.is/)**, a
privacy-friendly analytics tool that we **host ourselves** (on
`umami.relplay.org`). Nothing is sent to a third-party advertising
network.

For each page view we record:

- the page you viewed and the site you arrived from (the referrer),
- your browser, operating system, and device type,
- an approximate **country**.

That's it. The numbers are aggregated into counts — how many people read a
page, which pages are popular — and are never combined into a profile of an
individual.

## What we don't do

- **No cookies, and nothing stored on your device.** The tracker sets no
  cookies and writes nothing to local storage. You can confirm this in your
  browser's developer tools — there are no entries to clear.
- **No personal data.** Your IP address is used for a moment on our own
  server to derive the approximate country and to tell repeated page-loads
  apart within a single day; it is **not stored**.
- **No cross-site tracking.** We cannot and do not follow you to other sites,
  and we never sell or share what we measure.

## Your choices

If your browser sends a **Do Not Track** signal, we honour it: those visits
are not counted at all.

Because the analytics use no cookies and store nothing on your device, there
is no cookie banner to dismiss — there is simply nothing to consent to.

## Questions

This site and its analytics are operated by
[Lazy Evaluation Ltd](https://www.lazyevaluation.biz/). If you have any
questions about what we measure, get in touch through the contact details
there.
