Privacy

Last updated: 2026-09-03

The short version

This is a static website. We have no server, no database of users, and no accounts. We do not ask for your name, your email address, or your address, so we cannot sell or leak them.

What the calculator does with your usage

Nothing leaves your browser. The tariff data is downloaded to your device and the calculation runs locally in JavaScript. Your consumption figures are never transmitted to us or to anyone else, and we could not see them if we wanted to.

Cookies and advertising

This site carries no advertising and sets no cookies — not ours, and not anyone else's. It loads no third-party scripts, fonts, images or trackers at all, so nothing on it can set an advertising identifier or follow you to another site.

If advertising is added later, this notice will be updated before it goes live, and visitors in the EEA, UK and Switzerland will be asked to consent before any personalized advertising cookie is set.

Analytics

None. We run no analytics of any kind: no page-view counter, no advertising identifiers, and no attempt to identify or profile individual visitors. Apart from the pages and data files themselves, your browser is asked to load nothing.

Hosting and logs

The site is served as static files by GitHub Pages. GitHub may log requests, including IP addresses, as part of operating the service. That logging is GitHub's, governed by the GitHub Privacy Statement, and we have no access to those logs.

Children

This site is not directed at children and we do not knowingly collect any information from them.

Your rights

Because we hold no personal data about you, there is nothing for us to export, correct or delete.

Changes

Material changes to this notice will be reflected in the date at the top.

Contact

Questions about this notice, or a request to see, correct or delete data held about you: contact@nerdywatts.com.