PRIVACY

Privacy policy

Short version: we don't want your data. The site is a static app — the charts and calculator run entirely in your browser, and nothing you type is sent anywhere. We don't use analytics cookies, advertising identifiers or fingerprinting.

What this site stores on your device

Nothing persistent. Calculator inputs live in page state and disappear when you navigate away. No local-storage keys are set.

What the server sees

As with any website, your browser's requests reach our hosting provider, which may process standard connection logs (IP address, timestamps) for security and abuse prevention under its own privacy policy. We don't add identifiers on top of that.

Printable chart

Printing happens locally in your browser's print pipeline. No data leaves your device.

Changes

If this policy ever changes materially, the date below will be updated and the change summarized here.

Last updated: October 2026.