Privacy Policy

Account information: When you sign in with Google or LINE, we collect your email address, name, profile picture, and each provider's user identifier (including your LINE user ID).

Learning data: We collect learning records necessary to provide the Service, such as your answer history, scores, study progress, and the content you use.

Payment information: Payments for paid plans are processed through Stripe. Card numbers and other payment details are managed by Stripe and are not stored on the Service's servers.

Usage and device information: We automatically collect cookies, access logs, IP addresses, and browser and OS types.

To authenticate and manage your account and verify your identity.

To provide learning content, analyze performance, and deliver a personalized learning experience.

To process payments and manage billing for paid plans.

To send study reminders and notices via email and LINE (when you have opted in).

To improve service quality, prevent misuse, and produce statistical data.

The Service uses the following external services and shares information with them only to the extent necessary to achieve its purposes.

Google (login authentication) / LINE (login authentication and notification delivery) / Stripe (payment processing) / Vercel, Cloudflare, ConoHa (hosting and delivery) / Google Analytics (usage analysis) / Resend (email delivery).

Other than the above, we do not provide personal information to third parties without your consent, except where disclosure is required by law.

The Service uses cookies to maintain login sessions, analyze usage, and improve the Service. You can disable cookies in your browser settings, but some features may become unavailable.

We retain collected personal information for as long as necessary to provide the Service or as required by law. After account deletion, we delete the information within a reasonable period, except where retention is required by law.

You may request disclosure, correction, deletion, or suspension of use of your personal information. You can delete your account or change notification settings from My Page, or make a request via the contact below.

The Service implements appropriate security measures, including encrypted communication (HTTPS) and access controls, to prevent the leakage, loss, or damage of personal information.

Minors should use the Service only with the consent of a parent or guardian.

We may revise this policy as necessary. When we make significant changes, we will announce them on the Service. Continued use of the Service after a change constitutes acceptance of the revised policy.

For inquiries about this policy or the handling of personal information, please contact support@englishblitz.com (hours: weekdays 10:00-18:00 JST).