Privacy Policy

Last updated: June 2026

EngSandbox ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you visit our website.

Information We Collect

We collect minimal information to operate and improve our service:

  • Usage Data: Pages visited, features used, and interaction data collected via Google Analytics.
  • Local Progress Data: Your vocabulary practice history and scores are stored locally in your browser using IndexedDB / SQLite WASM. We never access this data.
  • Ad Data: Google AdSense may collect data as described in their privacy policy.

How We Use Your Information

We use the collected information to:

  • Provide and maintain our English practice platform
  • Analyze usage patterns to improve user experience
  • Display relevant advertisements via Google AdSense
  • Detect and prevent technical issues

Cookies

We use cookies and similar tracking technologies for analytics and advertising purposes. Google AdSense and Google Analytics use cookies to serve relevant ads and analyze traffic. You can control cookie preferences through your browser settings.

Third-Party Services

We use the following third-party services:

Data Security

All communication with our site is encrypted via HTTPS. Your practice data remains stored locally in your browser and is never transmitted to our servers. We do not operate any backend servers that collect or store personal information.

Your Rights

Depending on your location, you may have the right to:

  • Access information we hold about you
  • Request deletion of your data
  • Opt out of cookie-based tracking
  • Withdraw consent at any time

Contact Us

If you have any questions about this Privacy Policy, please contact us.

Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last updated" date.