Privacy Policy

Last updated: April 7, 2026 · Effective: April 7, 2026

The short version: All calculations happen in your browser. We do not store what you enter into any calculator on our servers. We use Google Analytics to understand aggregate traffic. We do not sell your data. We do not require an account or email address.

1. Who we are

nnng.com is a free online calculator resource. You can reach us at hello@nnng.com with any privacy-related questions or requests.

2. What data we collect

We collect two categories of data:

Analytics data — We use Google Analytics 4 (GA4) to collect anonymized, aggregate data about how visitors use the site. This includes pages visited, time on page, device type, browser, and approximate geographic region (country/city level). This data is used solely to understand which calculators are most useful and how to improve the site. Google Analytics may use cookies to distinguish returning visitors.
Local storage — We store your theme preference (light or dark mode) in your browser's local storage. This never leaves your device and is not transmitted to us.

We do not collect: names, email addresses, financial data, health data, or any inputs you enter into calculators. Calculator inputs are processed entirely within your browser and are never sent to our servers.

3. Cookies

We use cookies only through Google Analytics. These are first-party cookies set by Google Analytics to distinguish unique visitors and sessions. You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on or by enabling "Do Not Track" in your browser settings.

We do not use advertising cookies, tracking pixels, or any third-party marketing cookies.

4. How we use data

Analytics data is used to:

Understand which calculators are most frequently used
Identify technical issues (broken pages, slow load times)
Prioritize new features and calculator additions

We do not use your data for advertising, profiling, or any purpose beyond improving the site.

5. Data sharing

We do not sell, rent, or trade your data to any third party. The only third party that receives data about your visit is Google (via Google Analytics), which operates under its own privacy policy.

6. Data retention

Google Analytics data is retained for 14 months, after which it is automatically deleted. We do not maintain any other databases of user data.

7. Your rights

Depending on your location, you may have rights under GDPR (EU/UK), CCPA (California), or other applicable laws, including:

The right to know what data is collected about you
The right to request deletion of your data
The right to opt out of data collection

To exercise any of these rights, contact us at hello@nnng.com. For Google Analytics data specifically, use the Google Analytics Opt-out tool.

8. Children's privacy

nnng.com is not directed at children under 13. We do not knowingly collect any personal data from children. If you believe a child has provided personal data through this site, contact us and we will promptly address it.

9. Changes to this policy

If we make material changes to this privacy policy, we will update the "Last updated" date at the top of this page. Continued use of the site after changes constitutes acceptance of the updated policy.

10. Contact

For any privacy questions or requests: hello@nnng.com