Privacy Policy

Who we are

Karkai (“we”, “us”) provides this website and learning product to help you practice data structures and algorithms patterns. This policy describes how we handle personal information when you use our service.

Information we collect

• Account data: If you sign in (for example with email or a third-party provider), we process identifiers needed to create and secure your account, such as email address and profile metadata supplied by the auth provider.
• Usage and learning activity: We may store progress, lesson completion, practice sessions, and related technical events so we can show your journey, sync across devices, and improve the product.
• Support and feedback: Messages you send via contact, feedback, or feature-request forms, including your email when you provide it, so we can respond.
• Technical data: IP address, browser type, device identifiers, and similar logs may be collected automatically for security, debugging, and abuse prevention.

How we use information

We use the information above to operate the service, provide support, improve features, enforce our terms, comply with law, and protect users and the platform.

Analytics

We may use privacy-conscious analytics (for example Vercel Analytics / Speed Insights) to understand how the site performs and how pages are used. You can limit cookies in your browser settings where applicable.

Sharing

We share data with service providers who help us run the app (hosting, authentication, email, database). They may only process data on our instructions. We may disclose information if required by law or to protect rights and safety.

Retention

We keep data only as long as needed for the purposes above or as required by law. You may request deletion of your account subject to legal and operational constraints.

Your choices

Depending on where you live, you may have rights to access, correct, delete, or export your personal data, or to object to certain processing. Contact us to make a request.

Children

The service is not directed at children under 13 (or the age required in your region). We do not knowingly collect personal information from children.

International transfers

If you use the service from outside the country where our servers or providers operate, your data may be transferred and processed in those regions with appropriate safeguards.

Changes

We may update this policy from time to time. We will post the new date at the top and, where appropriate, provide additional notice.

Contact

Questions about privacy? Contact us.