Privacy Policy
Last updated: January 2026
Your trust matters to us. This policy explains in plain language what data we collect, why, and your choices.
What we collect
- Calculator inputs. Numbers you type into a calculator are processed entirely in your browser. They are not sent to our servers, not stored, and not shared with anyone.
- Basic analytics. We use privacy-friendly, aggregated analytics (page views, referrer, device type) to understand which calculators are popular. This does not identify you personally.
- Advertising. If ads are shown, an advertising partner (e.g. Google AdSense) may use cookies to serve relevant ads. You can control this in your browser or via ad settings.
- Contact form. If you email us, we use your details only to reply. They are never sold.
What we don't do
- We do not sell, rent or trade personal information.
- We do not require accounts, logins or personal data to use any calculator.
- We do not run email marketing unless you explicitly opt in via the newsletter.
Cookies
We use minimal cookies: functional preferences and, where advertising is enabled, advertising cookies placed by third-party ad networks. See our Cookie Policy for details and how to manage them.
Third-party services
We may use third-party services for hosting, analytics and advertising. These services may process anonymized data under their own privacy policies.
Children's privacy
The site is not directed at children under 13, and we do not knowingly collect their data.
Your rights
Depending on where you live (e.g. GDPR, CCPA), you may have rights to access, correct or delete data. Since we collect almost nothing, these rights are easy to honor — email us and we'll respond within 30 days.
Changes to this policy
We'll update this page when practices change and note the date above. Continued use of the site means you accept the current policy.
Contact
Questions about privacy? Contact us via the contact page.