Privacy Policy — English Guru

1 Introduction & Overview

At English Guru ("we", "our", or "us"), operated by Edtech BD, we respect your privacy and are committed to protecting your personal information. This Privacy Policy explains how we collect, use, disclose, and safeguard your data when you visit our website at https://www.englishguru.net or install and use the English Guru Android mobile application (Package Name: com.englishguru.net).

Please read this policy carefully. If you do not agree with the terms of this Privacy Policy, please do not access or use our application.

2 Information We Collect

We only collect information that is strictly necessary to provide you with effective English language learning features, assess your progress, and securely authenticate your sessions:

A. Personal Information

• Profile Data: Your name, chosen username, and email address or mobile phone number collected during voluntary registration.
• Credentials: Account login passwords, which are encrypted using irreversible salted cryptographic hashing algorithms before being stored. Plaintext passwords are never accessible by our staff.

B. Learning Progress & Academic Data

• Lesson Records: Completed grammar and vocabulary topics, time spent on exercises, and comprehension scores.
• Streaks & Badges: Daily learning streak counts, milestone badges, quiz results, and level placement assessment outcomes.
• Saved Content: Words bookmarked in the vocabulary builder and user-saved practice sentences.

C. Technical & Device Information

• Device Specifications: Device model, Android OS version, app version, screen resolution, and system language to ensure optimal app rendering and responsiveness.
• Push Notification Tokens: Firebase Cloud Messaging (FCM) tokens generated by Google Play Services, used solely to deliver optional daily vocabulary cards, class reminders, and app update alerts.
• Diagnostic Data: Crash traces and error logs collected via Google Firebase Crashlytics to detect software bugs and improve app reliability.

D. Payment Verification Details

• When you enroll in premium courses through mobile financial services (bKash, Nagad, Rocket) or direct bank transfer, we collect only the Transaction ID (TrxID), sender reference number, and payment timestamp for enrollment confirmation.
• No Sensitive Financial Data: We NEVER collect, store, or process credit/debit card numbers, CVV codes, or mobile banking PINs. All payments are verified securely.

3 How We Use Your Information

Your data is processed only for lawful and transparent purposes, including:

• Providing, operating, and personalizing the English Guru learning ecosystem.
• Tracking your course progress, calculating accuracy percentages, and issuing course completion certificates.
• Sending important transactional notifications (e.g., account verification, password resets, enrollment confirmations).
• Delivering opt-in daily vocabulary practice notifications and quiz reminders.
• Responding to customer care and technical support requests via WhatsApp and email.
• Monitoring app security, preventing abusive behavior or unauthorized access, and maintaining server stability.
• Zero Advertising Resale: We do NOT sell, rent, or trade your personal information to third-party data brokers or marketing agencies.

4 Data Security & Storage

We employ robust technical and organizational security measures to protect your personal information:

• 256-bit TLS/SSL Encryption: All data transmitted between the Android mobile app, web application, and our servers is encrypted using modern TLS cryptographic protocols.
• Google Cloud Infrastructure: Database storage is hosted in Google Cloud Platform (GCP) and Google Firebase Firestore, adhering to ISO 27001, SOC 1, SOC 2, and SOC 3 certifications.
• Restricted Access: Access to user data is strictly limited to authorized Edtech BD personnel who require it for operational support under strict non-disclosure obligations.

5 User Rights & Account Deletion (Google Play Compliance)

In accordance with Google Play's User Data & Account Deletion Policy, you have the fundamental right to request the permanent deletion of your account and personal data.

Ways to Submit a Deletion Request:

1. In-App: Open English Guru > Profile > Settings > Account > Delete Account.
2. Web Portal: Visit our dedicated portal at https://www.englishguru.net/delete-account.html.
3. Direct Email: Email [email protected] with your registered phone or email address.

6 Children's Privacy & Educational Safety

English Guru is committed to the protection of young learners:

• We comply with the principles of the Children's Online Privacy Protection Act (COPPA) and general student safety standards.
• We do not knowingly collect personal identifiable information from children under the age of 13 without parental or school guardian awareness.
• If you believe a child under 13 has submitted personal information to us without appropriate consent, please contact us at [email protected] so we can immediately purge the data.
• All educational content provided within English Guru is strictly family-friendly, positive, and educational.

7 Third-Party Service Providers

We partner with established third-party services for essential infrastructure:

• Google Firebase (Google LLC): Authentication, Firestore database storage, and Cloud Messaging (FCM). Google Privacy Policy.
• Google Play Services: In-app licensing, updates, and core runtime support.
• Mobile Financial Services: bKash and Nagad payment confirmation.

These service providers are bound by strict data processing agreements and are prohibited from utilizing student information for independent commercial or marketing purposes.

8 Developer & Data Protection Office Contact

If you have any questions, inquiries, complaints, or feedback regarding this Privacy Policy or your personal data rights, please contact the developer:

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