Privacy Policy

Last updated: 3 October 2026

The short version

Calculations happen in your browser. We do not ask you to create an account, and we do not receive the numbers or files you enter into a tool.

What we collect

• Anonymous tool usage. When a tool runs we record the tool, whether it succeeded, how long it took and the date. To limit abuse we store a one-way hash of your IP address, never the address itself. We never store what you typed.
• Ratings. If you rate a tool we store the star value and the same one-way hash so one person cannot vote repeatedly.
• Server logs. Our hosting provider keeps standard access logs (IP address, browser, page requested) for security and troubleshooting.

Analytics and advertising

When enabled, we use Google Analytics 4 to understand which pages are useful, and Google AdSense to show ads that fund the site. These services may set cookies or similar identifiers and process data under their own policies. Where the law requires it, they load only after you give consent in our cookie banner.

You can manage ad personalisation at Google Ad Settings and learn how Google uses data at policies.google.com.

Your choices

• Decline or withdraw cookie consent using the cookie settings link in the footer.
• Block cookies in your browser settings. The calculators keep working.
• Ask us to delete any data linked to you by emailing us. Because we store only hashes, we may not be able to identify your records.

Children

This site is not directed at children under 13 and we do not knowingly collect their personal data.

Changes

If we change this policy we will update the date above.