Privacy Policy

Last updated: October 2026

What we collect

The calculators run entirely in your browser; the values you enter are not sent to us. We use analytics to count page views, which may record your approximate country, browser type and the page you came from.

Email newsletter

If you sign up for our newsletter, we store your email address with our email provider to send you the cheat sheet and occasional tips. Every email has an unsubscribe link, and you can ask us to delete your address at any time.

Advertising and cookies

This site may show ads from third-party networks such as Google AdSense. These vendors may use cookies to serve ads based on your prior visits to this and other websites. You can opt out of personalised advertising at Google Ads Settings.

Affiliate links

Some links are affiliate links, including Amazon Associates. If you buy through them we may earn a commission at no extra cost to you.

Contact

Questions: tutuvictor51@gmail.com