Terms of Service

1. Acceptance of Terms

By accessing or using KanjiOS ("the Service"), you agree to be bound by these Terms of Service. If you do not agree to these terms, please do not use the Service. You must be at least 13 years old to use the Service.

2. Description of Service

KanjiOS is a web-based application for learning Japanese, including features for studying kanji, vocabulary, grammar, and custom study decks. The Service offers both free and paid tiers.

3. User Accounts

To access certain features, you may create an account using email or sign in via a supported authentication provider (Google, GitHub, or Discord). You are responsible for:

• Maintaining the security of your account
• All activities that occur under your account
• Ensuring your account information is accurate

4. Free and Paid Tiers

The Service offers a free tier with core functionality and paid tiers (Pro subscription or Lifetime one-time purchase) with enhanced features including:

• Cloud sync across all your devices
• Neural text-to-speech voices
• AI-powered study assistance
• Advanced analytics and insights

5. Payment Processing

6. User Content and Data

You retain ownership of all study data, custom entries, and content you create within the Service. By using the Service, you grant us a non-exclusive, worldwide license to store, process, and display your content solely for the purpose of providing and improving the Service.

7. Acceptable Use

You agree not to:

• Use the Service for any unlawful purpose
• Attempt to gain unauthorized access to any part of the Service
• Interfere with or disrupt the Service
• Share your account credentials with others
• Abuse Service features (such as AI assistance or text-to-speech) or circumvent anti-abuse measures

8. Intellectual Property

The Service, including its design, code, and original content, is protected by copyright and other intellectual property laws. Third-party content (such as dictionary data) remains the property of its respective owners.

9. Disclaimer of Warranties

The Service is provided "as is" without warranties of any kind, whether express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not guarantee that the Service will be uninterrupted, error-free, or completely secure.

10. Limitation of Liability

To the maximum extent permitted by law, we shall not be liable for any indirect, incidental, special, or consequential damages arising from your use of the Service.

11. Account Termination

We reserve the right to suspend or terminate your account if you violate these Terms, engage in fraudulent activity, or abuse the Service. Upon termination:

• Your access to paid features will be revoked
• Your local data remains on your device
• Cloud-synced data may be deleted after a reasonable period

12. Service Availability

We strive to maintain high availability but do not guarantee uninterrupted access. We reserve the right to modify, suspend, or discontinue any part of the Service with reasonable notice when possible. Critical changes will be communicated through the application or email.

13. Changes to Terms

We may update these Terms from time to time. We will notify users of material changes at least 14 days in advance through the application or email. Continued use of the Service after changes take effect constitutes acceptance of the new Terms.

14. Contact

For questions about these Terms, please contact us at support@kanjios.com.