Privacy

Your stability data never leaves your computer.

Your data

Tables you paste or open are read and analysed by code running in your browser. They are not uploaded, stored or seen by us. The calculator page is served with a Content Security Policy that forbids it from making network requests (connect-src 'none'), so it could not send your data anywhere even by mistake. You can check this in your browser's developer tools.

Saved analyses, CSV files and reports are created in your browser and downloaded straight to your computer.

Pro licences

If you buy Pro, the activation page (and only that page) sends your licence key to our payment provider, Lemon Squeezy, to check it, and then stores the result in your browser. Payment and billing details are handled by Lemon Squeezy under its own privacy policy.

Cookies and tracking

The site sets no cookies and uses no analytics or advertising trackers. A Pro licence, if you activate one, is kept in your browser's local storage.

Hosting

The site is hosted on Cloudflare, which processes standard request information (such as IP address and browser type) to deliver the pages and protect against abuse. This does not include your stability data.