Privacy Policy

Last updated: 2026-05-23

This Privacy Policy explains how CompoundCalc ("we", "us", "our") collects, uses, and shares information when you visit our website at YOUR_DOMAIN.com ("the Site"). By using the Site you agree to the practices described here.

1. Information We Collect

1.1 Information you provide

The calculator runs entirely in your browser. The numbers you enter (initial investment, rate, years, contribution) are never transmitted to our servers. They live in the browser's memory and disappear when you close the tab. If you choose to share a link generated by the "Share" button, those values are encoded into the URL you share.

1.2 Automatically collected information

When you visit the Site, our hosting provider and analytics tools may automatically collect:

• Your IP address (truncated where possible)
• Browser type, operating system, and device category
• The pages you visit and the time spent on each page
• Referring URL (the site you came from)

1.3 Cookies and local storage

We use the following:

• Strictly necessary local storage — to remember your dark / light theme preference and your cookie consent choice. This works without your consent because it is essential to the Site's basic function.
• Analytics cookies — only loaded if you click "Accept" on the cookie banner. We use these to understand aggregate traffic patterns. Data is anonymized.
• Advertising cookies — if and when we display ads (for example via Google AdSense), Google and its partners may set cookies to serve relevant ads and measure performance. These only load after you accept on the banner.

You can withdraw consent at any time by clearing your browser's local storage for this Site, which will cause the consent banner to reappear.

2. How We Use Information

• To operate and maintain the Site
• To understand how visitors use the Site so we can improve it
• To detect, prevent, and address technical issues or abuse
• To serve advertisements (only with your consent)
• To comply with legal obligations

3. Third-Party Services

We rely on the following third parties; please review their privacy policies:

• Hosting provider — serves the static files. Receives standard server logs.
• Google Analytics (with consent) — usage analytics. Google Privacy Policy
• Google AdSense (with consent, when ads are enabled) — Google and its partners may use cookies to serve ads based on your visits to this and other websites. You can opt out of personalized advertising at Google Ads Settings or via aboutads.info (US) and youronlinechoices.com (EU).
• Chart.js CDN (jsDelivr) — serves the charting library. May log standard CDN access information.

4. Your Rights

Depending on your jurisdiction (GDPR for the EU/UK, CCPA for California, and similar laws elsewhere) you may have the right to:

• Access the personal information we hold about you
• Request correction or deletion
• Object to or restrict certain processing
• Withdraw consent at any time
• Lodge a complaint with your local data protection authority

To exercise any of these rights, contact us at the address on the Contact page.

5. Data Retention

We retain server log data for up to 30 days for security and debugging. Aggregated, anonymized analytics data may be retained longer. Calculator inputs are never stored on our servers and have no retention period.

6. Children's Privacy

The Site is not directed to children under 13 (or under 16 in the EU). We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will delete it.

7. International Transfers

Our hosting and analytics providers may process data in countries outside your own, including the United States. Where required, we rely on standard contractual clauses or equivalent safeguards.

8. Changes to This Policy

We may update this Privacy Policy from time to time. The "Last updated" date at the top of this page reflects the most recent revision. Material changes will be highlighted on the Site.

9. Contact

Questions about this Privacy Policy? See the Contact page.