Terms of Use

Last updated: December 31, 2025

These Terms of Use ("Terms") govern your use of the mobile application "BeStudy JH Science" ("App") provided by crelve ("we", "us", or "our"). By using the App, you agree to be bound by these Terms.

Article 1. Application

These Terms apply to all relationships between us and users regarding the use of the App.

Article 2. Service Description

This App is an educational application designed to help junior high school students learn science. The App provides quiz-based learning content for grades 7-9 (Japanese junior high school curriculum).

Article 3. Account Management

You are responsible for properly managing your account information. You may not transfer or lend your account information to any third party under any circumstances.

Article 4. Prohibited Activities

You shall not engage in any of the following activities when using the App:

1. Activities that violate laws or public order and morals
2. Activities related to criminal acts
3. Activities that infringe on intellectual property rights, portrait rights, privacy, reputation, or other rights or interests of us or third parties
4. Activities that destroy or interfere with our servers or network functions
5. Activities that may interfere with the operation of the App
6. Unauthorized access or attempts thereof
7. Collecting or accumulating personal information about other users
8. Impersonating other users
9. Sharing, redistributing, or commercially using the educational content of this App without permission
10. Other activities we deem inappropriate

Article 5. Suspension of Service

We may suspend or interrupt all or part of the App without prior notice if we determine that any of the following circumstances exist:

1. When performing maintenance, inspection, or updates to the computer system for the App
2. When it becomes difficult to provide the App due to force majeure such as earthquakes, lightning, fire, power outages, or natural disasters
3. When computers or communication lines are stopped due to an accident
4. When we otherwise determine it is difficult to provide the App

Article 6. Usage Restrictions and Deregistration

We may restrict all or part of your use of the App or deregister your account without prior notice if you fall under any of the following:

1. If you violate any provision of these Terms
2. If it is discovered that there are false facts in your registered information
3. If we otherwise determine your use of the App to be inappropriate

Article 7. Paid Services

Some features of the App are provided as paid services (Premium Subscription).

1. The fees for paid services shall be the amounts displayed in the App or on the App Store / Google Play Store.
2. Payment shall be made through the payment system of the Apple App Store or Google Play Store.
3. Subscriptions will automatically renew unless you cancel at least 24 hours before the end of the current period.
4. Refunds are subject to each store's policies.

Article 8. Disclaimer

We do not expressly or impliedly warrant that the App is free from defects in fact or law (including but not limited to defects related to safety, reliability, accuracy, completeness, effectiveness, fitness for a particular purpose, security, errors, bugs, or infringement of rights).

We shall not be liable for any damages arising from the App, except in cases of our intentional or gross negligence.

Educational Content Disclaimer: The educational content provided in this App is for learning support purposes only. We do not guarantee specific academic results or test scores. For official curriculum or examination preparation, please consult with qualified educators and official educational materials.

Article 9. Changes to Service Content

We may change, add, or discontinue the content of the App with prior notice to users, and users agree to this.

Article 10. Changes to Terms

We may change these Terms without notice when we deem it necessary. The revised Terms shall take effect from the time they are posted in the App.

Article 11. Handling of Personal Information

Personal information obtained through the use of the App shall be handled appropriately in accordance with our "Privacy Policy."

Article 12. Notices and Communications

Notices or communications between users and us shall be made by the method specified by us.

Article 13. Governing Law and Jurisdiction

These Terms shall be governed by and construed in accordance with the laws of Japan. In the event of any dispute regarding the App, the courts having jurisdiction over our head office location shall have exclusive agreed jurisdiction.