Privacy Policy

This page describes what happens to information when you use this site, in plain language rather than boilerplate.

Analytics

This site uses Google Analytics (GA4) to understand which pages get read and how visitors find them. GA4 sets cookies in your browser and Google may process the resulting data according to its own privacy policy; Google is a recipient of that aggregate usage data as a result. Vercel Web Analytics, a second, simpler system that counts page views without a cookie, also runs alongside it. Neither is used to build an advertising profile of you personally, and no information collected here is sold to anyone.

If you subscribe to the newsletter, your email address is stored by Brevo, the service that sends the emails, and is used only to send the occasional update this site describes at signup. Every email includes an unsubscribe link that removes you immediately.

Contact form and email

Messages sent through the contact form are forwarded by Formspree to a single inbox read by a real person; nothing you write is stored anywhere else or used for any purpose beyond replying to you.

Payments

Purchases and contributions are processed entirely by Stripe. This site never sees or stores your card details — Stripe handles that directly, under its own security and privacy practices. The email address you provide at checkout is used to send the product you purchased, or a receipt for a contribution, and nothing more.

Cookies, in summary

Analytics cookies from Google Analytics are the primary cookie-setting mechanism on this site. No cookie here is used to track you across other, unrelated websites for advertising purposes.

Changes to this policy

If what this site collects or how it's used changes meaningfully, this page will be updated to reflect that, with the update visible here directly rather than announced separately.

What this site does not do

This site does not sell personal information to third parties, does not build cross-site advertising profiles from the analytics it runs, and does not require an account or login to use any page, tool or calculator. The four calculators — ratio, dial-in, timer and caffeine estimator — compute entirely in your browser and send nothing to any server at all.

Data retention

Newsletter addresses are kept until you unsubscribe. Contact form messages are kept only as long as needed to resolve whatever was reported. Payment records are retained by Stripe under its own policies, not by this site directly.

Children's privacy

This site is not directed at children and does not knowingly collect information from anyone under 13.

Questions

Anything about this policy that isn't clear is a good reason to use the contact page.