Privacy policy

Last updated: 8 July 2026.

English Grammar Lab (english.eduzonelab.com) is an English grammar learning application published by Eduzonelab. This page explains what data the app collects and how it is used.

Data we collect

• Account data: username and email address you provide when you register.
• Learning data: your CEFR level, lesson progress, exercise attempts and results, and placement test answers, so the app can adapt lessons to your level and show your progress.
• Free-text questions you send to the Grammar Tutor feature, so it can generate an answer.

What we do not collect

• No postal address.
• No payment information (the app is free).
• No advertising identifiers and no third-party analytics or advertising trackers.

How your data is used

Your data is used only to run the app: authenticating you, tracking your progress, and personalising lessons and exercises. Grammar Tutor free-text questions are processed by a language model running on our own server infrastructure — they are not sent to an external third-party AI provider.

Data sharing

We do not sell your data. We do not share your data with third parties for advertising or marketing. Your data stays on servers we operate.

Data retention and deletion

Your account and learning data are kept for as long as your account is active. You can ask us to delete your account and associated data at any time by contacting us at the address below.

Security

Passwords are stored using Django's salted-hash password system, never in plain text. The application runs over HTTPS. Access to the underlying database is restricted to the application server only.

Contact

Questions about this policy or your data can be sent to admin@eduzonelab.com.