Terms of Service

This is a reference translation. The Japanese version is the authoritative text; in case of any discrepancy, the Japanese version prevails.

Article 1 (Scope)

These Terms set out the conditions for using Kiteren (the "App") provided by Suimyo Studio (operated by CHUN WANG, the "Developer"). Users shall use the App only after agreeing to these Terms.

Article 2 (Accounts)

• Using the App requires signing in with an Apple ID or a Google account.
• Users are responsible for properly managing their own account.
• Transferring or lending an account is prohibited.

Article 3 (Prohibited Conduct)

Users must not engage in any of the following.

• Conduct that violates laws or public order and morals
• Harassment or defamation of other users
• Conduct that interferes with the operation of the App
• Unauthorized access or similar conduct
• Registering false information
• Using the App for commercial purposes (except where permitted by the Developer)
• Any other conduct the Developer deems inappropriate

Article 4 (Paid Plans)

• The Personal plan costs 480 JPY per month (tax included); the Pro plan costs 980 JPY per month (tax included).
• Payment is processed through Apple In-App Purchase or Google Play Billing. Part of subscription management is entrusted to RevenueCat, Inc.
• Subscriptions renew automatically. Unless cancelled at least 24 hours before the renewal date, you will be charged automatically.
• Subscriptions purchased in the app can be managed or cancelled from your device settings (App Store / Google Play); those purchased on our website can be managed from the account page on our website.
• After cancelling a paid plan, you may continue to use that plan's features for the remainder of the paid period.

Article 5 (AI Assist)

• AI Assist generates content using only on-device AI (iOS: Apple Intelligence / Apple Foundation Models; Android: Gemini Nano) and sends no data to external servers.
• This feature is available only on devices meeting all of the following conditions.
  • iOS: a supported iPhone running iOS 26 or later with Apple Intelligence enabled
  • Android: a supported Android device with Gemini Nano (hardware equivalent to Pixel 8 Pro or later, Android 14 / API 34 or later)
• On devices that do not meet these conditions, AI Assist is not shown and cannot be used. This results from hardware and software constraints imposed by device manufacturers and OS providers, and is not a defect of the App.
• Even on supported devices, the feature may be unavailable if AI functionality is disabled by OS settings, feature restrictions, or regional restrictions.
• Because availability of AI Assist depends on the user's device and OS environment, we cannot accept requests for refunds or compensation on the grounds that this feature is unavailable.
• The Developer does not warrant the accuracy or appropriateness of text generated by AI.
• Users are responsible for reviewing and editing AI-generated text before use.

Article 6 (Data Retention and Deletion)

• Data retention is one month on the Free plan and three months on the Pro plan.
• Data exceeding the retention period is deleted automatically.
• When downgrading from Pro to Free, groups enter a "frozen" state. In frozen groups, events can be viewed and answered, but new events cannot be created.
• When an account is deleted, all data is deleted immediately. This action cannot be undone.

Article 7 (Intellectual Property)

Intellectual property rights relating to the App belong to the Developer. Copyright in content posted by users belongs to the user, but the user grants the Developer a licence to use it to the extent necessary to provide and improve the App.

Article 8 (Disclaimer)

• The Developer does not warrant the completeness, accuracy, or usefulness of the App.
• The Developer is not liable for interruption or suspension of the App due to communication failures, server failures, or similar causes.
• The Developer is not involved in any disputes between users.

Article 9 (Changes to or Termination of the Service)

The Developer may change the content of the App or discontinue providing it without prior notice. Material changes will be announced in the App or on the website.

Article 10 (Changes to These Terms)

The Developer may revise these Terms as necessary. Revised Terms take effect when posted on this page. For material changes, renewed consent will be requested in the App.

Article 11 (Governing Law and Jurisdiction)

These Terms are governed by the laws of Japan. The Tokyo District Court shall have exclusive jurisdiction in the first instance over disputes relating to the App.

Article 12 (Contact)

For questions about these Terms, please reach us through the contact form.