Last updated: September 3, 2026

Cookie policy

Essential cookies

The authentication session cookie is required when you sign in. It is HTTP-only, uses a limited lifetime, and cannot be used to track you across unrelated sites.

Optional cookies and local storage

With your consent, we may use anonymous analytics or advertising technologies to understand performance and fund the service. The homepage stores your consent choice in local storage. Calculator results may be stored locally when you choose to export them.

Managing consent

You can clear cookies and site data in your browser settings. Blocking essential cookies may prevent GitHub login from working. Where third-party cookies are used, their providers offer additional controls in their own policies.

GDPR and ePrivacy

We request consent for non-essential technologies where required by law and do not make access to the free calculators conditional on accepting optional tracking.