1. Introduction
HanDa ("we," "us," or "our") is committed to protecting your personal information. This Privacy Policy explains what data we collect, how we use it, and the rights you have over your information.
By using HanDa, you agree to the practices described in this policy.
2. Information We Collect
Account Information
When you create an account, we collect your email address, display name, and optionally a profile photo.
Learning Data
As you use HanDa, we collect:
- Conversations with AI tutors
- Pronunciation recordings and assessment scores
- Learning progress, XP, and level data
- Session history and usage patterns
Payment Information
Payment processing is handled entirely by a third-party payment provider. We do not store your credit card numbers or banking details — only your subscription status and plan type.
3. How We Use Your Information
We use your information solely to provide and improve the HanDa service:
- Personalized learning — adapting AI responses to your level and tracking your progress
- Service improvement — analyzing usage patterns to improve our AI tutors and features
- Communication — sending weekly learning reports and re-engagement notifications
- Support — responding to your questions and resolving issues
We do not use your data for advertising purposes, and we do not sell your personal information to third parties.
4. Third-Party Services
To provide our service, HanDa works with trusted third-party partners. These partners process data only as necessary to deliver our service and are bound by confidentiality obligations.
Categories of third-party services we use:
- AI & machine learning — powers our tutors, content generation, and learning analysis
- Cloud infrastructure — hosting, API processing, and content delivery
- Authentication & database — secure account management and data storage
- Payment processing — subscription billing
- Voice & speech technology — pronunciation assessment and audio generation
- Email delivery — learning reports and notifications
Each partner processes data in accordance with their own privacy policies and applicable data protection laws.
5. Data Storage & Security
Your data is stored in secure cloud infrastructure with encryption in transit (HTTPS) and at rest. Access controls and Row Level Security (RLS) ensure that users can only access their own data. API keys and credentials are never exposed to the client.
We retain your learning data for as long as your account remains active. Upon account deletion, your personal data is removed within 30 days.
6. Your Rights
Regardless of your location, you have the right to:
- Access the personal data we hold about you
- Request correction of inaccurate data
- Request deletion of your account and associated data
- Export your learning history
- Opt out of marketing and re-engagement emails at any time
To exercise any of these rights, contact us at [email protected].
7. Regional Privacy Rights
HanDa complies with applicable privacy regulations based on your location, including:
- Korea — Personal Information Protection Act (PIPA): We disclose the categories of personal information collected, the purpose of processing, and the retention period. Where personal information is transferred outside Korea, we take appropriate safeguards to ensure equivalent protection.
- European Union — GDPR: We process your personal data on the legal basis of contract performance and legitimate interest. EU residents have the right to data portability and the right to lodge a complaint with a supervisory authority.
- California — CCPA: California residents have the right to know what personal information is collected, to request deletion, and to opt out of the sale of personal information. We do not sell personal information.
To exercise region-specific rights, contact us at [email protected].
8. Cookies
HanDa uses only essential cookies required for authentication and session management. We do not use third-party tracking cookies or advertising cookies.
9. Children's Privacy
HanDa is not directed at children under 13. We do not knowingly collect personal information from children under 13. If we become aware that a child under 13 has provided personal information, we will delete it promptly.
10. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of significant changes via email or in-app notification. Continued use of HanDa after changes take effect constitutes acceptance of the revised policy.