Privacy Policy - HSC Chinese Companion

1. Information We Collect

1.1 Account Information (if you create an account)

Email address (for authentication only)
Authentication provider (Google, Apple, or email sign-up)

1.2 Learning Data

Data Type	Examples	Purpose
Learning progress	Lessons completed, vocabulary mastered	Track your learning
Practice performance	Quiz accuracy, writing scores	Personalised recommendations
Study time	Session duration, study frequency	Learning analytics

1.3 Technical Data

Device type and operating system (e.g. iOS 17)
App version
Crash logs and error reports
Anonymous device identifier (hashed, not traceable to you)

1.4 Content You Submit

Writing submissions (sent to AI for grading, not stored permanently)
Voice recordings (processed in real-time for pronunciation assessment, not retained)

We do NOT collect: real names, school names, student IDs, home addresses, phone numbers, precise geolocation, contacts, photos, or calendar data.

2. How We Use Your Information

Provide and improve the learning experience
Save and sync your learning progress across devices
Generate personalised study recommendations
Diagnose and fix technical issues

We do not sell your data, use it for advertising, or share it with other users.

3. Third-Party Services

Service	Purpose	Data Shared
Supabase	Authentication & data sync	Email, learning progress
Google Cloud TTS	Text-to-speech (pronunciation demos)	Text content
Google Cloud STT	Speech recognition (oral practice)	Audio (real-time, not stored)
Google Gemini AI	Writing assessment & grading	Writing submissions (not stored)

All third-party services comply with GDPR requirements and have data processing agreements in place.

4. Data Storage and Security

Local storage: Learning progress is stored on your device by default.
Cloud sync (optional): If you create an account, data is synced to secure servers.
Encryption: All network communication uses HTTPS/TLS encryption.
Data isolation: Each user's data is fully isolated using Row Level Security.

Data Retention

Data Category	Retention Period
Learning progress	While you use the App
Learning statistics	1 year rolling
Technical logs	30 days
Crash reports	90 days

5. Your Rights

Under the Australian Privacy Act, you have the right to:

Access your personal data
Export your learning data
Delete your account and all associated data at any time (Profile → Delete Account)
Opt out of cloud sync by using the app without creating an account

6. Children's Privacy

This App is designed for HSC students (typically aged 16–18). Students aged 16 and over may consent independently. Students under 16 should use the App under parental guidance. We do not knowingly collect personal information from children under 13.

7. Tracking and Analytics

This App does not track you across other apps or websites. We do not use advertising identifiers or participate in any ad tracking networks.

8. Contact and Complaints

For privacy enquiries, contact us at: [email protected]

If you believe we have breached the Australian Privacy Principles, you may lodge a complaint with the Office of the Australian Information Commissioner (OAIC):

Website: www.oaic.gov.au
Phone: 1300 363 992

We may update this privacy policy from time to time. Significant changes will be communicated via an in-app notification.