Privacy Policy

Last Updated: December 2025

Welcome to Hiyori (hereinafter referred to as "the Service" or "we"). We take your privacy very seriously. This Privacy Policy explains how we collect, use, store, and protect your personal information.

Information We Process

1.1 Information You Provide

  • Account Information: When you register, you provide your email address or third-party account information (such as Apple ID) for login.
  • Diary Content: The diary text content you write in the App.
  • Calendar Data: With your authorization, we access event information from your iOS system calendar.

1.2 Information Automatically Collected

  • Device Information: Device model, operating system version, unique device identifier.
  • Usage Data: App usage frequency, feature usage records, comic generation count.
  • Error Reports: Diagnostic information when the App crashes or errors occur.

1.3 AI Generated Content

  • Comic Images: Comic images generated by AI based on your diary content.

How We Use Information

We use this information to:

  • Provide, maintain, and improve the Service
  • Generate personalized comics based on your diary content
  • Sync your data to the cloud for access across devices
  • Send service-related notifications (such as daily reminders)
  • Analyze usage trends to improve user experience
  • Respond to your customer service requests
  • Detect and prevent fraud or abuse

Information Sharing and Disclosure

We do not sell your personal information. We may share your information in the following circumstances:

3.1 Service Providers

We may share information with third-party service providers to help us provide services, including:

  • Cloud storage services
  • AI image generation services
  • Data analytics services

3.2 Legal Requirements

If required by law or to protect our rights, your or others' safety, we may disclose your information.

Data Security

We take appropriate technical and organizational measures to protect your personal information:

  • SSL/TLS encryption during data transmission
  • Encryption of stored data
  • Regular security reviews and updates
  • Restricted employee access to personal data

Data Retention

We retain your personal information for the duration of your use of the Service and for the period necessary to fulfill the purposes described in this Policy. When you delete your account, we will delete or anonymize your personal information within a reasonable time, unless required by law to retain it longer.

Your Rights

You have the following rights regarding your personal information:

  • Right to Access: You can view your diaries and comics in the App at any time.
  • Right to Correction: You can edit or update your diary content.
  • Right to Deletion: You can delete individual diaries, or delete your entire account in settings, and we will completely remove all your data.
  • Right to Data Portability: You can download your generated comic images.
  • Right to Withdraw Consent: You can withdraw calendar access permission at any time in device settings.

Third-Party Services

The Service may contain links to third-party websites or services. We are not responsible for the privacy practices of these third parties. We recommend reading the privacy policy of any third-party service you visit.

Policy Changes

We may update this Privacy Policy from time to time. When we make significant changes, we will notify you through in-app notifications or other appropriate means. We recommend regularly reviewing this Policy to understand how we protect your information.

Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us through:

Have any questions?

We're happy to answer any questions about the Privacy Policy.

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