Privacy Policy

Last updated: August 31, 2026

Your privacy is important to us. This Privacy Policy explains how Ichizu ("we", "us", or "our") collects, uses, stores, and protects your personal information when you use our mobile, desktop, and web applications (collectively, the "App" or "Service").

1. Information We Collect

Depending on how you use our App, we may collect the following information:

• Account Information: When you register for synchronization, we collect your email address via Firebase Authentication.
• User Data: Tasks, notes, list items, AI Chat history, and custom configurations that you create. If you use the free local tier, this data is stored entirely on your local device. If you subscribe to Ichizu+, this data is securely uploaded to Firebase Cloud Firestore for cross-device synchronization.
• AI Agent Images: If you select a custom image for an AI agent, the App converts it to a compact data URI stored with the AI configuration. For Ichizu+ accounts, that configuration can be synchronized in Cloud Firestore; the App does not use Firebase Cloud Storage.
• API Keys: If you provide custom API keys, they are encrypted in local storage. For Ichizu+ synchronization, proxy keys are also stored in an encrypted envelope in Cloud Firestore.
• Payment Information: We do not collect or store credit card details or bank info. Payment data is currently processed entirely by Google Play under its privacy policy.

2. How We Use Your Information

We use the collected information only to:

• Provide, maintain, and support the App features.
• Enable secure cross-device data synchronization.
• Authenticate your login and secure your synchronized data.
• Track and verify your active subscription status.

3. Generative AI Data Handling

Ichizu includes features that allow interaction with Generative Artificial Intelligence (AI) models:

• Prompt Transmission: When you enter messages into the AI Chat, your prompt text and any user-attached context are transmitted to the configured third-party AI provider (such as OpenRouter) solely to produce responses.
• No Commercial Sale or Ad Targeting: We do not sell, trade, or share your AI prompts or generated content with third-party advertisers or data brokers.
• User Control: You can delete your AI chat history at any time directly within the App.

4. Data Storage and Security

Local tasks, notes, lists, chats, and AI settings are stored in encrypted Hive databases whose key is kept in the platform's secure credential store. Synchronized traffic uses HTTPS and data is stored in Cloud Firestore under access rules tied to the authenticated account. The encrypted API-key envelope is not end-to-end encryption against compromise of that Firebase account. You retain ownership of the content you create in Ichizu.

5. Data Sharing and Third Parties

We do not sell, trade, or share your personal data with third parties for marketing or tracking purposes. We share data only with trusted service providers necessary for the functioning of the App, including:

• Google Firebase: For authentication, Cloud Firestore synchronization, backend functions, and web hosting.
• RevenueCat and Google Play Store: For subscription offerings, purchase processing, and entitlement verification.
• AI Providers (e.g., OpenRouter): If you configure and use AI features, your prompts are transmitted to the respective AI provider to generate responses.

6. Children's Privacy

Ichizu is not directed to children under the age of 13 (or under 16 in certain European Union countries). We do not knowingly collect or solicit personal information from children. If we learn that we have collected personal data from a child without parental consent, we will delete that information as quickly as possible.

7. Your Rights and Data Deletion

You have full control over your data. You can edit, modify, or delete your tasks, notes, and lists directly inside the App at any time. If you wish to delete your entire account and all synchronized cloud data permanently, use account deletion within the App settings or contact our support at ichizu.support@gmail.com.

8. Changes to This Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date.

9. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or your personal data, please contact us at:

Email: ichizu.support@gmail.com