Privacy Policy

Last updated: February 20, 2026

DataField.Dev ("we," "our," or "us") operates the website datafield.dev. This Privacy Policy explains how we collect, use, and protect information when you visit our site.

1. Information We Collect

We do not require you to create an account or provide personal information to access our textbooks. However, we may collect the following:

• Usage data: Pages visited, time spent on pages, referring URLs, browser type, device type, and operating system. This data is collected through analytics tools and is used in aggregate to understand how visitors use the site.
• Cookies and similar technologies: We use cookies for essential site functionality (such as theme preference) and, with your consent, for advertising purposes.

2. Cookies

We use the following types of cookies:

• Essential cookies: These are necessary for the website to function and cannot be switched off. They include your theme preference (light/dark mode) and cookie consent choice. These are stored in your browser's local storage.
• Advertising cookies: If you consent to "Accept All" cookies, we load Google AdSense which may set cookies to serve personalized or non-personalized ads based on your browsing history. You can withdraw consent at any time by clearing your browser's local storage.

3. Google AdSense

We use Google AdSense to display advertisements on our site. Google AdSense may use cookies and web beacons to collect data about your visits to this and other websites in order to provide targeted advertisements. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and/or other sites on the Internet.

You can opt out of personalized advertising by visiting Google's Ads Settings. Alternatively, you can opt out of third-party vendor cookies by visiting the Network Advertising Initiative opt-out page.

4. Google Analytics

We may use Google Analytics to understand how visitors interact with our site. Google Analytics collects information such as how often users visit the site, what pages they visit, and what other sites they used prior to coming to our site. We use this information solely to improve the site. Google Analytics collects the IP address assigned to you on the date you visit the site, but we do not combine this with other data we hold.

5. How We Use Information

We use collected information to:

• Provide and maintain our free educational content
• Understand and analyze usage trends to improve the site
• Display relevant advertisements to support the site financially
• Remember your preferences (such as dark/light theme)

6. Data Sharing

We do not sell, trade, or otherwise transfer your personal information to third parties. Information may be shared with:

• Google AdSense/Google Analytics: As described above, for advertising and analytics purposes, subject to Google's Privacy Policy.
• Legal requirements: We may disclose information if required by law or in response to valid legal process.

7. Data Retention

Cookie consent preferences and theme settings are stored in your browser's local storage until you clear it. We do not maintain server-side databases of user information. Analytics data is retained according to Google's standard retention policies.

8. Your Rights

You have the right to:

• Choose "Essential Only" cookies when prompted, preventing advertising cookies from loading
• Clear your browser's local storage at any time to reset all preferences and consent
• Use browser extensions to block ads or trackers
• Opt out of Google's personalized advertising

9. Children's Privacy

Our site is educational in nature and does not knowingly collect personal information from children under 13. Our content is designed for a general audience including students at the college level and above.

10. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be reflected on this page with an updated "Last updated" date. Your continued use of the site after changes constitutes acceptance of the updated policy.

11. Contact

If you have questions about this Privacy Policy, please reach out through our About page.