Privacy Policy

Last updated: 03 Sep, 2025

Effective Date: 01 Sep, 2025

Introduction

NineCoach (“we,” “our,” or “us”) operates the NineCoach AI Language Coach mobile application (the “Service”). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application.

Information We Collect

Personal Information

  • Account Information: Email address, name, and authentication credentials
  • Profile Data: Native language, learning goals, English proficiency level (CEFR assessment results)
  • Usage Data: Practice session records, progress tracking, time spent in sessions
  • Audio Recordings: Voice recordings during practice sessions for AI analysis and feedback

Automatically Collected Information

  • Device Information: Device type, operating system, unique device identifiers
  • Usage Analytics: App usage patterns, feature interactions, session duration
  • Performance Data: App crashes, errors, and technical diagnostics

Third-Party Authentication

When you sign in using Google or Apple Sign-In, we receive:

  • Basic profile information (name, email)
  • Authentication tokens (we do not store your Google/Apple passwords)

How We Use Your Information

Core Functionality

  • Provide personalized English coaching and feedback
  • Process voice recordings through AI analysis (OpenAI Whisper & GPT-4)
  • Track your learning progress and generate performance insights
  • Deliver scenario-based practice sessions
  • Conduct weekly assessments and skill evaluations

Service Improvement

  • Analyze usage patterns to improve app functionality
  • Monitor app performance and fix technical issues
  • Develop new features based on user needs

Communication

  • Send practice reminders and progress updates
  • Provide customer support
  • Notify you of important app updates or changes

Third-Party Services

We integrate with the following third-party services:

Supabase

  • Purpose: Backend services, user authentication, data storage
  • Data Shared: Account information, practice history, user profiles
  • Privacy Policy: https://supabase.com/privacy

OpenAI

  • Purpose: AI-powered coaching, voice analysis, and feedback generation
  • Data Shared: Voice recordings, practice session content
  • Privacy Policy: https://openai.com/privacy
  • Note: Voice recordings are processed for immediate feedback and not stored by OpenAI

RevenueCat & SuperWall

  • Purpose: Subscription management and paywall presentation
  • Data Shared: User identifiers, subscription status
  • Privacy Policies: RevenueCat · SuperWall

Mixpanel

  • Purpose: Analytics and user behavior tracking
  • Data Shared: Usage events, session data (anonymized)
  • Privacy Policy: https://mixpanel.com/privacy

Sentry

  • Purpose: Error monitoring and crash reporting
  • Data Shared: Technical errors, crash reports, user identifiers for debugging
  • Privacy Policy: https://sentry.io/privacy

Apple App Store / Google Play

  • Purpose: In-app purchases and subscription management
  • Data Shared: Purchase information, subscription status

Voice Recording Privacy

Collection and Processing

  • Voice recordings are collected during practice sessions for immediate AI analysis
  • Recordings are processed by OpenAI’s Whisper API for speech recognition
  • AI feedback is generated using OpenAI’s GPT-4 based on your speech patterns

Storage and Retention

  • Voice recordings may be temporarily stored for session playback
  • We do not permanently store raw audio files
  • Transcribed text and feedback may be retained for progress tracking

User Control

  • You can pause or stop recording at any time during practice sessions
  • You can delete your account and associated data through app settings

Data Security

We implement industry-standard security measures:

  • Encryption: All data transmission uses TLS/SSL encryption
  • Authentication: Secure OAuth integration with Google and Apple
  • Access Control: Limited access to personal data on a need-to-know basis
  • Regular Updates: Continuous security monitoring and updates

Data Retention

  • Account Data: Retained while your account is active
  • Practice History: Retained to track your progress and provide insights
  • Voice Recordings: Temporarily processed and not permanently stored
  • Analytics Data: Anonymized analytics may be retained indefinitely for service improvement

Your Rights and Choices

Account Management

  • Access: View your personal data and practice history in the app
  • Update: Modify your profile information and learning preferences
  • Delete: Delete your account and associated data through app settings

Communication Preferences

  • Notifications: Control push notifications in app settings
  • Marketing: Opt out of promotional communications

Data Portability

Contact us to request an export of your personal data in a machine-readable format.

Children’s Privacy

Our service is not intended for children under 13. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided personal information, please contact us.

International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. We ensure appropriate safeguards are in place for such transfers.

Changes to This Privacy Policy

We may update this Privacy Policy periodically. We will notify you of significant changes through:

  • In-app notifications
  • Email notifications (if provided)
  • App Store update notes

Contact Us

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

California Privacy Rights (CCPA)

If you are a California resident, you have additional rights under the California Consumer Privacy Act:

  • Right to know what personal information is collected
  • Right to delete personal information
  • Right to opt-out of sale of personal information (we do not sell personal information)
  • Right to non-discrimination

To exercise these rights, contact privacy@ninecoach.ai.

European Data Protection Rights (GDPR)

If you are in the European Economic Area, you have additional rights under GDPR:

  • Right of access to your personal data
  • Right to rectification of inaccurate data
  • Right to erasure (“right to be forgotten”)
  • Right to restrict processing
  • Right to data portability
  • Right to object to processing
  • Right to withdraw consent

To exercise these rights, contact privacy@ninecoach.ai.