🔒 Privacy Policy & Cookie Notice
Last updated: December 11, 2025
At Box 3 Calculator (box3calculator.com), we are committed to protecting your privacy. This policy explains how we collect, use, and protect your information when you use our website.
1. Information We Collect
1.1 Information You Provide
When you use our calculator, you enter financial information (savings, investments, debts). This data is processed entirely in your browser and is NOT sent to our servers or stored anywhere. We do not collect, store, or have access to your financial information.
1.2 Automatically Collected Information
We use Google Analytics 4 (GA4) to understand how visitors use our website. This may include:
- Pages visited and time spent on each page
- Browser type and version
- Device type (desktop, mobile, tablet)
- Geographic location (country/city level)
- Referring website
- IP address (anonymized)
1.3 URL Parameters
When you use the "Share Results" feature, your calculator inputs are encoded in the URL. This allows you to share your calculation with others. These parameters are only processed in the browser and are not logged by our servers.
2. How We Use Your Information
We use the collected information to:
- Improve the website's functionality and user experience
- Understand which features are most useful to visitors
- Analyze traffic patterns and optimize performance
- Fix bugs and technical issues
- Generate anonymous, aggregated statistics
We do NOT: Sell your data, share it with third parties for marketing purposes, or use it to identify you personally.
3. Cookies & Tracking Technologies
3.1 What Are Cookies?
Cookies are small text files stored on your device when you visit a website. They help websites remember your preferences and analyze how you use the site.
3.2 Cookies We Use
Analytics Cookies (Google Analytics 4)
Purpose: Track website usage and performance
Duration: Up to 2 years
Cookies: _ga, _ga_*, _gid
Provider: Google LLC
Essential Cookies
Purpose: Enable basic website functionality
Duration: Session only
These cookies are necessary for the website to function and cannot be disabled.
4. Third-Party Services
We use the following third-party services:
Google Analytics 4
Analytics and website traffic analysis. Google Privacy Policy
Vercel (Hosting)
Website hosting and content delivery. Vercel Privacy Policy
5. Data Security
We take data security seriously. Our website uses HTTPS encryption to protect data in transit. Since we don't store your financial information, there's no risk of it being compromised in a data breach.
6. Your Rights Under GDPR
If you are in the European Union, you have the following rights:
- Right to Access: Request a copy of your personal data
- Right to Rectification: Request correction of inaccurate data
- Right to Erasure: Request deletion of your data
- Right to Restrict Processing: Request limitation of data processing
- Right to Data Portability: Receive your data in a structured format
- Right to Object: Object to processing of your data
Since we don't store your financial data, most of these rights don't apply. For analytics data, you can opt out using browser settings or contact us.
7. Children's Privacy
Our website is not intended for children under 16. We do not knowingly collect personal information from children.
8. Changes to This Policy
We may update this privacy policy from time to time. Changes will be posted on this page with an updated "Last updated" date. We encourage you to review this policy periodically.
9. Contact Us
If you have questions about this privacy policy or how we handle your data, please contact us:
In Summary
- ✓ Your financial data stays in your browser - we never see it
- ✓ We use Google Analytics to improve the website
- ✓ You can disable cookies in your browser settings
- ✓ We don't sell or share your data with third parties
- ✓ HTTPS encryption protects your connection