This Privacy Policy explains how Nexplay AI LLC ("MathKnights," "we," "us," or "our") collects, uses, and shares information when you use the MathKnights website, applications, and related services (the "Service"). It covers both parent/guardian account holders and the child profiles ("Knights") created under those accounts.
Specific protections for children under 13 in the United States are described in Section 8 and in our separate Children's Privacy Notice.
We do not ask for or knowingly accept a child's real name, email, phone number, address, photo, voice recording, or geolocation.
| Purpose | What we use |
|---|---|
| Provide the Service — sign you in, run quests, save progress, show history | Email, password hash, PINs, knight names, practice activity, settings |
| Send progress reports and account emails | Parent email, practice activity |
| Process subscription payments | Billing details (held by payment processor), email |
| Improve the Service and create new features | Aggregate, de-identified usage data and log data |
| Security, fraud prevention, and abuse detection | Log data, IP address, device data, account activity |
| Comply with law and enforce our Terms | As needed |
We do not use child data to build advertising profiles, and we do not use child practice data to train third-party machine-learning models.
We share information only in the limited cases below:
We do not sell or rent personal information. We do not share personal information for cross-context behavioral advertising (sometimes called "targeted advertising"). We do not allow third-party advertising networks to track Knights inside the Service.
We use a small number of cookies and similar technologies to keep you signed in, remember your preferences, and measure aggregate site usage. We do not use third-party advertising cookies. You may block cookies in your browser, but parts of the Service may not function correctly if you do.
We keep account information for as long as your account is active. You can delete a Knight profile at any time from the parent dashboard, which removes that Knight's display name, PIN, and practice history. If you delete your parent account, we delete or de-identify associated personal information within 30 days, except where we are required to keep records (for example, tax or fraud-prevention records held by our payment processor).
We use reasonable administrative, technical, and organizational measures to protect personal information — including TLS in transit, hashed passwords and PINs, access controls, and the practice of not storing payment card data on our servers. No system is perfectly secure, however. If we discover a security incident affecting your information, we will notify you as required by applicable law.
MathKnights is intended to be used by children under the supervision of a parent or legal guardian who maintains the account. We follow the U.S. Children's Online Privacy Protection Act ("COPPA") for users under 13. Our full Children's Privacy Notice explains:
You can:
Depending on your state of residence (for example, California, Colorado, Connecticut, Texas, Virginia, and others with comprehensive privacy laws), you may have additional rights, including the right to know, correct, delete, port, and opt out of certain processing. To exercise these rights, email support@mathknights.com. We will verify your request using your account email and respond within the time required by law. We do not discriminate against users who exercise their privacy rights.
California residents: in the past 12 months we have collected the categories of information described in Section 2 for the purposes described in Section 3. We do not sell or share personal information as those terms are defined under California law, and we do not knowingly sell or share the personal information of consumers under 16.
MathKnights is operated from the United States. If you use the Service from outside the U.S., you understand that information will be transferred to and processed in the United States, which may have different data-protection laws than your country.
If we make material changes to this Privacy Policy, we will notify you by email or by a notice in the Service before the changes take effect. The "Last updated" date at the top will reflect the most recent revision.
To exercise any of the rights above, ask a question, or raise a privacy concern, contact us at:
MathKnights Privacy
Email: support@mathknights.com
Mailing address: Nexplay AI LLC
6955 Long Leaf Drive
Parkland, FL 33076