Privacy Policy

1. Client-Side Calculations and Local Storage

The Texas Instruments TI-84 Plus CE and TI-30XS simulators hosted on calc84online.com operate as client-side web applications executed through your web browser using HTML5, JavaScript, and WebAssembly technologies.

When you enter mathematical formulas, graph functions, load lists, or perform matrix calculations, none of this computational data is transmitted to or stored on our servers.

To preserve your calculator’s RAM state, zoom settings, and program memory across browser sessions, the emulator utilizes your browser’s native localStorage or IndexedDB feature. This information remains solely on your local device and can be cleared at any time by clearing your browser cache or pressing the in-simulator RAM Reset function.

2. Information Automatically Collected (Log Files)

Like virtually all web hosts and content delivery networks (Cloudflare), our servers automatically record standard technical log information when you access calc84online.com. This log data may include:

• Your Internet Protocol (IP) address (anonymized where applicable)
• Browser type and version (e.g., Chrome, Safari, Firefox, Edge)
• Operating system (e.g., ChromeOS, macOS, Windows, iOS, Android)
• Referring URL, exit pages, and date/time stamps
• Pages visited and bandwidth utilized

This data is used solely for network security, DDoS mitigation, diagnosing server errors, and optimizing resource delivery to schools and classrooms.

3. Cookies, Web Beacons, and Advertising

A cookie is a small file placed on your device to store user preferences and track aggregated site metrics.

Third-Party Advertising: To keep this educational simulator free and accessible to all students, we may work with third-party advertising partners (such as Google AdSense). These third-party vendors use cookies (including the DoubleClick cookie) to serve ads based on your visit to this site and other websites on the Internet.

Users may opt out of personalized advertising by visiting:

4. Amazon Associates & Affiliate Disclosure

calc84online.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for websites to earn advertising fees by linking to Amazon.com.

When you click on an external link to purchase a physical TI-84 Plus CE or TI-30 calculator on Amazon, an affiliate tracking cookie is placed by Amazon to credit any qualifying purchases. This incurs no additional cost to you and helps fund our web servers and continuous software improvements.

5. Children's Online Privacy Protection (COPPA Compliance)

calc84online.com is designed as an educational STEM resource suitable for middle school, high school, and college students. We are fully committed to protecting student privacy:

• We do not require user registration or personal accounts.
• We do not solicit, collect, or store personally identifiable information (PII) from children under the age of 13.
• If a parent, legal guardian, or school administrator believes personal data has inadvertently been submitted to us, please contact us immediately, and we will promptly purge it from our records.

6. European Union (GDPR) and California (CCPA/CPRA) Privacy Rights

Depending on your jurisdiction, you may have specific statutory privacy rights:

• GDPR (European Economic Area): You have the right to access, rectify, or request deletion of personal information held in server logs, or to object to certain processing activities.
• CCPA/CPRA (California Residents): You have the right to know what personal categories of data are collected, request deletion, and opt out of the sale or sharing of personal data for cross-context behavioral advertising. We do not sell personal identification data.

7. Changes to This Privacy Policy

We may occasionally update this Privacy Policy to reflect changes in our technology, legal obligations, or service offerings. Any revisions will be reflected on this page with an updated "Last Modified" timestamp. We encourage users to periodically review this page.