Privacy Policy

This privacy policy explains how TopMarginCalculator (“we”, “us”) collects, uses and protects information when you visit topmargincalculator.com (the “site”). The calculators on this site run entirely in your browser — your inputs never leave your device.

What information we collect

We do not ask you to create an account, and we do not collect any personal information directly. The data the site may receive is:

• Cookies and similar tech — essential cookies for the site to function (such as your dark / light mode preference), and optionally analytics and advertising cookies as described below.
• Standard server logs — IP address, user agent, referring URL and the page requested, collected by our hosting provider (Vercel) for security and operational purposes.
• Information you choose to send us — if you email us via the contact page, we keep the message and your email address only as long as needed to reply and follow up.

Cookies

A cookie is a small text file stored in your browser. We use cookies for:

• Preferences — your chosen colour scheme (dark or light mode) is stored locally so the next visit feels the same.
• Analytics (when enabled) — we may use a privacy-friendly analytics tool such as Google Analytics 4 to understand which pages get visited and how people use the site, in aggregate.
• Advertising — see the Google AdSense section below.

Where required (for example, for visitors from the EEA, UK or other jurisdictions with consent rules), we ask for your consent before setting non-essential cookies. You can withdraw consent and clear cookies at any time using your browser’s settings.

Google AdSense

We plan to display advertising on this site through Google AdSense. As a third-party vendor, Google uses cookies — including the DoubleClick DART cookie — to serve ads to you based on your prior visits to this and other websites. You can opt out of personalised advertising at any time by visiting Google Ads Settings. You can also opt out of third-party vendor use of cookies for personalised advertising at aboutads.info/choices.

For visitors in the EEA, UK and Switzerland, a Google-certified Consent Management Platform (CMP) collects your consent preferences before any advertising or analytics cookies are set.

How we use information

We use the limited information described above to:

• operate, secure and improve the site;
• understand which calculators and content are most useful, in aggregate;
• display advertising that pays for the site to stay free;
• respond to messages you send us.

We do not sell personal information. We do not share personal information with third parties except as described above (analytics and advertising vendors), or as required by law.

Children’s privacy

This site is not directed at children under 13, and we do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us so we can delete it.

Changes to this policy

We may update this policy from time to time. When we do, the “Last updated” date at the top will change. Significant changes will be noted in a banner or on the home page where reasonable.

Contact

For any privacy question, email contact@topmargincalculator.com.

This policy is a starting template. Review with a qualified lawyer before publishing if your situation requires specific legal compliance (e.g. GDPR, CCPA, LGPD).