Overview
NumStack ("we", "our") operates numstack.net. This Privacy Policy explains how we handle information.
Information We Collect
Automatically Collected
- Google Analytics: Pageviews, user flow, device type. Aggregated and anonymized only.
- Server logs: IP addresses, browser type, pages visited.
- Cookies: Essential cookies only (no tracking cookies).
Information You Provide
- Calculator inputs: NOT stored or logged. Used only for real-time calculations.
- Email (optional): If you sign up for updates, we store your email.
- Contact form: If you contact us, we store your message.
How We Use Your Data
We use data to:
- Understand site usage patterns
- Improve calculator accuracy and performance
- Fix bugs and improve user experience
- Send you updates (only if you opted in)
Data Sharing
We do NOT share your data with third parties, except:
- Google Analytics: Aggregated, anonymized analytics
- Law enforcement: If required by legal process
Security
We use HTTPS encryption on all pages. Your data is stored securely and not transmitted insecurely.
Your Rights
You have the right to:
- Request what data we have about you
- Request deletion of your data
- Opt out of analytics tracking
- Unsubscribe from emails
To exercise these rights, contact us.
Third-Party Services
Google Analytics: Google's Privacy Policy
Railway (hosting): Railway's Privacy Policy
Changes to This Policy
We may update this policy from time to time. Significant changes will be posted here.
Contact
Questions? Email: [email protected]