Privacy Policy

Last updated: June 17, 2026

1. Overview

Hana Lang ("we", "us") values your privacy. This policy explains how we collect, use, and protect your information when you use our mobile app.

2. Information We Collect

• Email address (via Firebase Authentication)
• Learning data: stages, progress, weak points
• Daily usage data: number of conversation turns used
• Device type (iOS / Android)

3. How We Use Your Information

• Providing AI-personalized curriculum
• Tracking learning progress
• Improving app performance
• Processing subscription payments (RevenueCat)

4. Third-Party Services

• Firebase (Google): Authentication and data storage
• OpenAI: AI conversation generation
• RevenueCat: Subscription payment processing

5. Data Retention

Your data is retained while your account is active. You can delete your account at any time in Settings, or send a deletion request to elitekira@gmail.com.

6. Children's Privacy

Hana Lang is not directed at children under 13, and we do not knowingly collect personal information from children.

7. Contact

For privacy-related inquiries: elitekira@gmail.com

8. GDPR — EU Users

If you are located in the European Economic Area (EEA), the following applies to you under the General Data Protection Regulation (GDPR).

Legal Basis for Processing

We process your personal data based on the following legal bases:

• Contract performance — to provide the Hana Lang service you signed up for
• Legitimate interests — to improve our AI curriculum and app experience
• Consent — for optional analytics and marketing communications

Your Rights

As an EEA resident, you have the following rights:

• Right of access — request a copy of your personal data
• Right to rectification — correct inaccurate data
• Right to erasure — delete your account anytime in Settings, or email us
• Right to data portability — receive your data in a portable format
• Right to object — object to processing based on legitimate interests
• Right to restrict processing — request limitation of how we use your data

Third-Party Data Processors

We share data with the following processors under GDPR-compliant agreements:

• Google Firebase — authentication and database (EU data residency available)
• OpenAI — AI conversation processing (data not used for training by default)
• Anthropic — AI tutor responses
• RevenueCat — subscription management

Data Retention

We retain your data for as long as your account is active. Upon account deletion, your data is removed within 30 days.

Contact & Complaints

To exercise your rights or make a complaint, contact us at elitekira@gmail.com. You also have the right to lodge a complaint with your local data protection authority.