Privacy Policy

We may collect personal information that you voluntarily provide when you:

• Fill out our contact form (name, email address, message)
• Send us an email directly

We only collect the minimum information necessary to respond to your inquiry. We do not require account registration to use any feature of this website.

When you visit our website, certain information is collected automatically by our servers and third-party services, including:

• IP address (anonymized where possible)
• Browser type and version
• Operating system
• Referring URL (the page you came from)
• Pages visited and time spent on each page
• Date and time of your visit
• Device type (desktop, tablet, mobile)

This information is collected through cookies, web beacons, and similar tracking technologies (described in Section 3).

We do not collect:

• Sensitive personal data (health, financial, or government ID information)
• Data from children under 13 years of age (see Section 8)
• Payment information (this site has no paid features)

We use the information we collect for the following purposes:

• To respond to your messages and inquiries submitted via our contact form or email.
• To understand how visitors use our website so we can improve content, tools, and user experience.
• To display relevant advertisements through Google AdSense (see Section 4 for full details).
• To monitor website performance and diagnose technical issues.
• To comply with applicable laws and regulations.

We do NOT:

• Sell your personal information to third parties.
• Use your information for unsolicited marketing emails.
• Share your personal data with third parties except as described in this policy.

You can control and manage cookies in several ways:

Browser Settings: Most browsers allow you to refuse or delete cookies. Please note that disabling cookies may affect the functionality of some parts of this website.

• Chrome: Settings → Privacy and Security → Cookies
• Firefox: Settings → Privacy & Security → Cookies
• Safari: Preferences → Privacy → Cookies
• Edge: Settings → Privacy, Search and Services

Opt Out of Personalized Advertising:

You can opt out of personalized ads served by Google and other participating companies by visiting:

• Google Ad Settings: https://adssettings.google.com ↗
• Network Advertising Initiative opt-out: https://optout.networkadvertising.org ↗
• Digital Advertising Alliance opt-out: https://optout.aboutads.info ↗

If you opt out, you will still see ads, but they will not be personalized based on your interests.

This website uses Google AdSense, an advertising service provided by Google LLC, to display advertisements.

Google AdSense uses cookies and similar technologies to:

• Serve ads based on your prior visits to this website and other websites across the internet.
• Measure ad performance and prevent fraudulent clicks.
• Personalize ads based on your interests and browsing history (unless you opt out).

Google may use the DoubleClick cookie and other cookies to serve ads to you based on your visit to this site and/or other sites on the Internet.

You may opt out of personalized advertising by visiting: https://www.google.com/settings/ads ↗

You can also opt out of a third-party vendor's use of cookies for personalized advertising by visiting: https://optout.aboutads.info ↗

For more information about how Google uses data when you use our site, please visit: https://policies.google.com/technologies/partner-sites ↗

This website uses Google Analytics, a web analytics service provided by Google LLC. Google Analytics uses cookies to help us analyze how users interact with our website.

The information generated by the cookie about your use of this website (including your IP address, which is anonymized before storage) is transmitted to and stored by Google on servers in the United States.

Google uses this information to:

• Evaluate your use of the website
• Compile reports on website activity
• Provide other services relating to website activity and internet usage

You can prevent Google Analytics from collecting your data by installing the Google Analytics Opt-out Browser Add-on: https://tools.google.com/dlpage/gaoptout ↗

For more information on Google Analytics privacy practices: https://policies.google.com/privacy ↗

Our website may contain links to third-party websites, calculators, or resources. These links are provided for your convenience only.

We have no control over the content or privacy practices of those websites and accept no responsibility for them. We encourage you to read the privacy policy of any third-party website you visit.

Contact Form Submissions:

Messages submitted through our contact form are retained only as long as necessary to respond to your inquiry, and are not stored in any database beyond our email inbox.

Analytics Data:

Anonymized analytics data collected by Google Analytics is retained according to Google's data retention policies.

We do not maintain any long-term user database or personal data records.

This website is not directed to children under the age of 13, and we do not knowingly collect personal information from children under 13.

If you are a parent or guardian and believe your child has provided us with personal information, please contact us immediately at [email protected] and we will take steps to delete such information.

Note: While our math content is suitable for students of all ages, the advertising and data collection practices described in this policy are governed by COPPA (Children's Online Privacy Protection Act) and we comply with its requirements.

If you are located in the EEA, you have the following rights regarding your personal data:

• Right of Access - You can request a copy of the personal data we hold about you.
• Right to Rectification - You can request correction of inaccurate personal data.
• Right to Erasure - You can request deletion of your personal data ("right to be forgotten").
• Right to Restrict Processing - You can request that we limit how we use your data.
• Right to Data Portability - You can request your data in a machine-readable format.
• Right to Object - You can object to our processing of your personal data.

To exercise any of these rights, please contact us at: [email protected]

If you are a California resident, you have the right to:

• Know what personal information we collect about you.
• Know whether your personal information is sold or disclosed, and to whom.
• Opt out of the sale of your personal information.
• Request deletion of your personal information.
• Not be discriminated against for exercising your privacy rights.

We do not sell personal information.

To submit a CCPA request, contact us at: [email protected]

Regardless of your location, you may:

• Opt out of personalized advertising at any time via https://adssettings.google.com ↗
• Request that we delete any contact information you have submitted to us
• Contact us with any privacy-related questions

We take reasonable technical and organizational measures to protect the information we handle against unauthorized access, loss, or misuse.

Our website uses HTTPS encryption to protect data transmitted between your browser and our server.

However, no method of transmission over the internet or electronic storage is 100% secure. While we strive to protect your information, we cannot guarantee its absolute security.

We may update this Privacy Policy from time to time to reflect changes in our practices, technology, or legal requirements.

When we make changes, we will:

• Update the "Last Updated" date at the top of this page.
• Post the revised policy at this same URL.

We encourage you to review this page periodically. Your continued use of this website after any changes constitutes your acceptance of the updated policy.

If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us: