Privacy Policy

Pemdazzle (“we,” “us,” or “our”) is a math practice web app operated by Columnrow, located in Mountain View, CA. This Privacy Policy explains what information we collect, how we use it, and your rights — especially as they relate to children.

We take the privacy of young learners seriously. Pemdazzle is designed to be used by children under the supervision of a parent or guardian. We do not require children to create accounts, and we do not knowingly collect personal information from children under 13 without verifiable parental consent.

If you have any questions, contact us at: columnrow.ai@gmail.com

What We Collect

Information stored on your device (localStorage)

Pemdazzle saves game progress — scores, streaks, selected game modes, and settings — directly in your browser’s local storage. This data never leaves your device and is never sent to our servers. It is tied to the specific browser and device you use. You can delete it at any time by clearing your browser’s site data.

Camera data

If you choose to use hand-gesture input, Pemdazzle requests access to your device’s camera. All image processing happens locally on your device in real time. No images, video frames, or biometric data are ever stored, recorded, or transmitted to any server.

Voice data

If you choose to use voice input, Pemdazzle uses your browser’s built-in Web Speech API. Audio is processed by your browser (and, on some platforms, by the browser vendor’s speech recognition service). Pemdazzle does not receive, store, or transmit any audio recordings.

Analytics

Pemdazzle is built on Firebase (Google). Firebase Analytics is currently disabled. We do not collect usage analytics, page views, or behavioral data at this time. If we enable analytics in the future, we will update this policy and provide appropriate notice.

Information we do NOT collect

• Names, email addresses, or contact information
• Precise location data
• Payment information
• IP addresses stored by us
• Any data linked to a personal account

Children’s Privacy (COPPA)

Pemdazzle is a tool intended for use by children under the direct supervision of a parent or guardian. We comply with the Children’s Online Privacy Protection Act (COPPA).

Because Pemdazzle does not require account creation and does not collect personal information from any user — child or adult — no verifiable parental consent mechanism is currently required. All game data stays on the device being used.

We will never knowingly collect personal information from a child under 13. If you believe we have inadvertently received such information, please contact us immediately at columnrow.ai@gmail.com and we will delete it promptly.

Third-Party Services

Pemdazzle uses the following third-party technologies. We encourage you to review their privacy policies:

• Firebase (Google) — provides our hosting and backend infrastructure. Firebase may collect standard server logs (IP address, request timestamps) as part of normal web hosting operations. See Firebase Privacy Policy.
• MediaPipe (Google) — the hand-landmark detection AI model is loaded from Google’s CDN. No video or image data is sent to Google. See Google Privacy Policy.

Data Retention & Deletion

All game data is stored locally on your device. We have no access to it and cannot delete it on your behalf. To remove all Pemdazzle data:

1. Open your browser settings
2. Navigate to “Site Settings” or “Storage”
3. Find Pemdazzle and select “Clear data”

On most browsers you can also open Developer Tools → Application → Local Storage → right-click and delete the Pemdazzle entry.

Your Rights

Because we do not collect or store personal information on our servers, most traditional data-rights requests (access, correction, portability) apply to the data on your own device, which you control directly.

If you are a California resident, you may have additional rights under the CCPA. If you are located in the European Economic Area, you may have rights under the GDPR. In either case, because we hold no personal data about you, there is nothing for us to provide, correct, or delete on our end.

For any privacy concerns or questions, contact us at columnrow.ai@gmail.com. We will respond within 30 days.

Changes to This Policy

We may update this Privacy Policy from time to time, especially as Pemdazzle adds new features such as accounts or subscriptions. When we do, we will update the “Last updated” date at the top of this page. If changes are material, we will make reasonable efforts to notify users (such as a notice on the home page).