Privacy Policy

Last updated: 2026-10-24

This site is operated by an independent creator based in China.

Tools

All calculators run in your browser. We do not ask for accounts and do not store what you type into the tools.

Hosting

The site is hosted on GitHub Pages, which may log basic technical data such as IP addresses for security. See GitHub's privacy statement.

Purchases

If you buy a product, our payment provider (the merchant of record) collects your name, email, billing details and payment information to process the order. We receive your name, email and order details so we can deliver the product and provide support. We do not see or store your full card details, and we do not sell your personal data.

Emails

If you email us, we use your address only to reply.

Advertising

We use Google AdSense to show ads. Google and its partners use cookies to serve ads based on your prior visits to this and other websites. You can opt out of personalized advertising at Google Ads Settings or aboutads.info. See how Google uses data from partner sites.

Your choices

You can ask us to access or delete the personal data we hold about you by emailing tianxiemoyu@gmail.com.