Privacy policy

Personal information we collect

The site has no sign-up or login, and it does not directly collect personal information such as names, email addresses or phone numbers.

Numbers and expressions you enter in the calculators are processed only in your browser and are not sent to the site’s servers.

Information stored in your browser

For convenience, the following settings are stored in your browser. They stay on your device, are not sent to the site, and are removed when you clear the site’s data in your browser settings.

• Your angle unit (degrees, radians or gradians)
• The calculator mode you used last (scientific or basic)
• The language you chose
• The expression carried over when you switch between the scientific and basic calculators (removed when you close the tab)

Access logs

Our hosting provider (Cloudflare) may process records such as IP addresses, browser type and access time for security and to operate the service. These records are handled under the provider’s own privacy policy.

Analytics and advertising

The site does not currently use analytics tools or advertising. If we add a visitor statistics tool (such as Google Analytics) or advertising (such as Google AdSense), we will list the tools and cookies in this policy before they start and ask for your consent where the law requires it.

Children’s privacy

The site does not knowingly collect personal information from anyone, including children.

Changes to this policy

If we change this policy, we will post the changes and the new effective date on this page.

Contact

For privacy questions, please write to contact@oncalc.org.