Privacy Policy

Last updated: September 13, 2026

No personal data collected

This website does not collect, store, or process any personal data. There are no user accounts, no sign-up forms, and no newsletters. All calculations run entirely in your browser; the inputs you enter (ticker, amounts, dates) are never sent to our servers.

No cookies

We do not set cookies and we do not use any cookie-based tracking or advertising identifiers.

Analytics

We use a privacy-friendly, cookie-free analytics service to understand aggregate traffic (such as page views and referrers). This analytics tool does not use cookies, does not fingerprint devices, and does not collect or store personal information. Aggregate statistics cannot be traced back to any individual visitor.

Affiliate links

Some pages contain affiliate links to brokerage services (for example, Interactive Brokers). If you open an account through one of these links, we may earn a commission at no additional cost to you. Clicking an affiliate link takes you to a third-party website that operates under its own privacy policy, which we encourage you to review. We do not receive any personal information about you from these third parties.

Changes to this policy

If our data practices change (for example, if we add new analytics or advertising), we will update this page and revise the date above.

Contact

If you have questions about this privacy policy, please reach out via the contact information published on this site.