Last updated: September 3, 2026

Privacy policy

What we collect

Free Online Calculator receives information you choose to submit, such as a GitHub account identifier when you sign in. Calculator inputs are processed in your browser unless a page says otherwise. Basic server logs may include IP address, browser, and request time for security and reliability.

How we use it

We use information to provide login, protect the service, understand aggregate usage, prevent abuse, and improve our tools. We do not sell personal information.

Third parties

GitHub provides OAuth authentication. Vercel hosts the website. Advertising, analytics, or affiliate partners may process information under their own policies when those services are enabled.

Your rights under GDPR

Depending on where you live, you may request access, correction, deletion, restriction, portability, or object to processing. Contact the site owner through the deployment account with enough detail to identify your request. You may complain to your local data protection authority.

Retention and security

Sessions expire after seven days. We keep operational records only as long as reasonably needed for the purposes above and use reasonable technical safeguards. No online service can guarantee absolute security.