1. Introduction

This Privacy Policy governs the manner in which CS Pocket ("we", "our", or "the app") treats user information. CS Pocket is an educational computer science handbook and exam revision application designed to function entirely offline on Android devices.

2. Zero Personal Data Collection

We respect your privacy unconditionally. When you use CS Pocket:

• We do not collect names, email addresses, phone numbers, or passwords.
• We do not require user registration, login, or social authentication.
• We do not collect location data, GPS data, or IP addresses.
• We do not collect unique device identifiers (IMEI, Android ID, MAC address).
• We do not access your camera, microphone, contacts, photos, or file system outside of app sandbox storage.

3. Offline-First Architecture

All educational syllabi, topic summaries, cheat-sheets, code examples, and practice quiz questions are bundled locally inside the application binary. The app does not request or require the android.permission.INTERNET permission in its Android Manifest. It operates normally when your device is in Airplane Mode.

4. Local Data Storage on Device

The app only stores lightweight user preferences locally on your physical device using Android's standard SharedPreferences mechanism:

• Theme Preference: Light, Dark, or System Default.
• Completed Topics: Local identifiers of chapters you have marked as read.
• Bookmarks: Topics or questions you choose to bookmark for revision.
• Quiz Statistics: Scores, accuracy percentages, and study streak counters from your offline practice sessions.

This data never leaves your device and is never transmitted to any external server or third-party cloud service.

5. No Advertising or Analytics SDKs

CS Pocket contains:

• No third-party advertisements or ad-serving SDKs (e.g., Google AdMob, Unity Ads).
• No analytical or telemetry trackers (e.g., Google Analytics, Firebase, Mixpanel).
• No crash-reporting software that transmits data over the network.

6. User Data Control & Deletion

You maintain complete control over your locally stored information:

• You can reset all completed topics, bookmarks, and quiz history at any time using the Reset Progress button in the in-app Settings screen.
• You can clear all stored application data at any time via Android System Settings > Apps > CS Pocket > Storage > Clear Storage.
• Uninstalling the app immediately deletes all local files and stored preferences permanently.

7. Children's Privacy (COPPA Compliance)

Because CS Pocket does not collect any personal information whatsoever, it complies fully with the Children's Online Privacy Protection Act (COPPA), GDPR, and Google Play Families Policy. It is safe for students and learners of all ages.

8. Changes to This Privacy Policy

Since this app operates completely offline without data collection, changes to this policy are unlikely. If we update this document, the updated version will be published at this location with a revised "Last Updated" date.

9. Contact Us

If you have any questions or feedback regarding this Privacy Policy or CS Pocket, you may reach out to the developer at:

Email: support@cspocket.app (or your developer contact email)