Contact us

Email is the only contact channel and the fastest way to reach a human. We read and reply to every message — usually within a few business days.

Email us at [email protected]

What to write about

• Math correction: include the URL, your inputs, and the number you expected.
• Article correction: link the paragraph and the correct source.
• Feature request: tell us what decision the missing tool would help you make.
• Press / partnerships: include who you are and what you have in mind.
• Security report: please prefix the subject with [SECURITY].

Why no contact form?

A traditional contact form needs a server-side endpoint to receive submissions. We deliberately run on a 100% static architecture so this site stays free at any traffic level — no signup walls, no email-list capture, no third-party tracking. A plain mailto: link gives you the same outcome with one fewer middleman.