We collect as little as possible.

This website

promethean.is is a static website. We do not set cookies, and we do not run third-party tracking scripts. Fonts are served from our own domain; no third-party font service is used.

We do use a privacy-respecting analytics tool so we can see how the site is used and improve it. It runs on our own infrastructure, so no outside company receives the data. It sets no cookies, gives us no way to identify you, does not follow you to other websites, and does not build a profile of you. It does not store your IP address: your address is read once to work out an approximate location, such as country or city, and then discarded. What it records is aggregate — which pages were viewed, the referring page, browser and device type, screen size and language.

Our hosting provider may keep standard server logs, such as IP address, browser type, and pages requested, for security and operations.

Information you send us

When you use a form on this site, we keep your message and the contact details you provide, typically your name and email address, so we can reply and follow up. We do not sell or rent that information. We share it only with service providers that help us run the business, such as the service that delivers form submissions to us, and only as needed to do so.

Heatoshi® and the companion app

Heatoshi® devices and the companion app are covered by their own privacy terms, provided at purchase and in the app. Those terms describe what the device reports, such as temperature, power draw, and earnings, and how that data is stored.

Your rights

You can ask what personal information we hold about you, and ask us to correct or delete it. Use the form below. We will respond promptly.

Changes

If this policy changes, we will update the date at the top of this page. Continued use of the site after a change means you accept the updated policy.

Privacy and security

Ask us about privacy, or report a vulnerability.

Ask us anything about this page. For a data request, tell us whether you want a copy of what we hold, a correction, or deletion. If you are reporting a security vulnerability, tell us what you found and how to reach you; we will confirm receipt and agree on a disclosure timeline with you before anything is published.