Privacy Policy

Last updated: June 2026

This Privacy Policy describes how calctool.app ("we", "us", or "our") handles information when you use our website.

Information we collect

calctool.app does not collect or store any personal information. Every calculator runs entirely in your browser — any numbers or values you enter are never transmitted to our servers.

Local storage

We store a single value (theme) in your browser's local storage to remember your light/dark mode preference. This value contains no personal information and is never shared or transmitted.

Analytics

We may use standard web analytics (such as Google Analytics or Cloudflare Web Analytics) to understand aggregate traffic patterns — e.g. page views and referrer information. This data is not linked to any individual user.

Third-party links

Our site may contain links to external websites. We are not responsible for the privacy practices of those sites.

Children's privacy

calctool.app is a family-friendly site. We do not knowingly collect any information from children under 13.

Changes to this policy

We may update this policy from time to time. The date at the top of this page reflects the most recent revision.

Contact

Questions about this policy? Reach out on Bluesky.