Privacy Policy

Last updated: October 2026

Overview

compost.tools ("we," "our," or "the site") is operated by Aureate LLC, a Virginia limited liability company, and we're committed to protecting your privacy. This policy explains what data we collect, how we use it, and your choices. All calculations run entirely in your browser, no calculation inputs are transmitted to our servers.

Information We Collect

We don't ask for your name or email unless you contact us, and the calculators send nothing you type to our servers. Three services do collect data about your visit, and some of it (your IP address, cookie identifiers, and the pages you view) counts as personal data under the GDPR and similar laws:

• Analytics (Google Analytics 4): GA4 collects usage data including pages visited, time on page, browser and device type, and a coarse location derived from your IP address, which Google says it does not log or store. We use this to understand which calculators are most useful. Outside the EEA, UK, and Switzerland analytics runs by default and you can opt out at any time using the "Reject" button on the cookie banner. Within the EEA, UK, and Switzerland no analytics cookies are set until you explicitly accept; until then GA4 uses only anonymized, cookieless Consent Mode measurement (no cookies, no cross-site identifiers).
• Advertising (Google AdSense): Google, as a third-party vendor, uses cookies and device identifiers to serve and measure ads on this site, and may personalize them based on your visits to this and other websites. Personalized advertising and advertising cookies are disabled everywhere until you explicitly accept. Read how Google uses information from sites that use its services, and manage or opt out of personalized ads in Google Ads Settings.
• Cloudflare Web Analytics: our host injects a small analytics script (static.cloudflareinsights.com) into every page. It measures page loads and performance without cookies, localStorage, or cross-site identifiers, so it runs regardless of your cookie choice; like any web server, it sees your IP address and browser type in the request. See Cloudflare's Privacy Policy.

If you click "Reject," no analytics or advertising cookies are set and any prior consent is withdrawn. The site functions identically with or without consent.

Cookies

compost.tools sets the following first-party cookies:

• compost_consent: Stores your cookie consent choice ("accepted" or "rejected"). Duration: 365 days. No personal data.
• _ga, _ga_<id>: Google Analytics 4 cookies used to distinguish unique visitors. Outside the EEA, UK, and Switzerland they are set by default and removed if you click "Reject"; inside those regions they are set only after you accept. Duration: up to 2 years. No directly identifying data.

Inside the EEA, UK, and Switzerland, Google Analytics sets no cookies until you accept (using only cookieless measurement until then). Google AdSense may set advertising cookies only after you accept, in all regions. See Google's Privacy Policy for details.

Local Storage

The site stores your unit preference (US vs. metric) in your browser's localStorage under the key compost_us. This data never leaves your browser and is not accessible to us.

Google Consent Mode v2

We use Google Consent Mode v2 with region-scoped defaults. For visitors in the EEA, UK, and Switzerland, all ad_storage, ad_user_data, ad_personalization, and analytics_storage signals default to "denied" and are upgraded to "granted" only if you explicitly accept. While analytics is "denied," GA4 sends only cookieless, anonymized Consent Mode pings (no cookies are written) until you accept. For visitors elsewhere, analytics_storage defaults to "granted" (so anonymized analytics works without a click) while all advertising signals remain "denied" until you accept. Clicking "Reject" downgrades every signal back to "denied."

Third-Party Services

• Google Analytics 4: Privacy Policy
• Google AdSense: Privacy Policy
• Cloudflare: The site is hosted on Cloudflare Workers, and Cloudflare Web Analytics runs on every page (see above). Cloudflare may log request metadata per their Privacy Policy.

Your Rights

You may withdraw consent at any time by clearing your browser cookies and local storage for compost.tools. If you are in the EU/EEA or UK, you have rights under GDPR including access, correction, deletion, and objection to processing. Contact us at contact@compost.tools to exercise these rights.

Children's Privacy

compost.tools does not knowingly collect data from children under 13. If you believe a child has provided personal information, contact us immediately.

Contact

For privacy questions: contact@compost.tools