Privacy Policy

📖 1. Introduction

Welcome to Ketuo's Privacy Policy. This Privacy Policy describes how Ketuo ("we," "us," or "our") collects, uses, stores, and protects information when you use our mobile application ("App"). We are committed to protecting your privacy and ensuring transparency about our data practices.

By downloading, installing, or using the Ketuo App, you acknowledge that you have read and understood this Privacy Policy and agree to its terms. If you do not agree with this Privacy Policy, please do not use the App.

ℹ️ 2. Information We Collect

2.1 Information We DO NOT Collect

Ketuo is designed to respect your privacy. We want to be clear about what we DO NOT collect:

• Personal identification information (name, email, phone number, address)
• User account credentials (no registration required)
• Location data or GPS coordinates
• Contact lists or address books
• Photos, videos, or media files
• Browsing history or web activity
• Device identifiers for tracking purposes
• Biometric data
• Social media profiles or connections

2.2 Information Stored Locally on Your Device

The following information is stored exclusively on your device and is never transmitted to our servers:

2.3 In-App Purchase Information

When you make in-app purchases, payment processing is handled entirely by Apple through the App Store. We receive only the following information from Apple:

• Transaction receipt (encrypted and validated)
• Product ID of purchased items
• Purchase timestamp

We do NOT receive or store your payment card information, billing address, or any other financial data. All payment information is processed and stored by Apple in accordance with their privacy policy.

🎯 3. How We Use Information

Since all data is stored locally on your device, we use this information solely to:

1. Provide Core Functionality: Enable calculation tools, unit conversions, and educational features
2. Maintain User Preferences: Remember your customization choices and settings
3. Track Virtual Currency: Manage your coin balance for accessing premium features
4. Display History: Show your calculation history and learning progress
5. Validate Purchases: Verify in-app purchase receipts to grant virtual currency
6. Improve User Experience: Optimize app performance based on local usage patterns

🔄 4. Data Sharing and Disclosure

4.1 No Data Sharing

We do not share, sell, rent, or trade your information with third parties for their commercial purposes. Since we don't collect personal data, there is nothing to share.

4.2 Third-Party Services

The App integrates with the following third-party services:

• Apple App Store: For app distribution and in-app purchase processing. Subject to Apple's Privacy Policy.
• Apple StoreKit: For managing in-app purchases and validating receipts locally on your device.

These services may collect information as described in their respective privacy policies. We recommend reviewing their policies:

• Apple Privacy Policy: https://www.apple.com/privacy/

4.3 Legal Requirements

We may disclose information if required to do so by law or in response to valid requests by public authorities (e.g., a court or government agency). However, since we don't collect or store personal data on our servers, we have minimal information to disclose.

🔐 5. Data Security

We take data security seriously and implement appropriate technical and organizational measures to protect your information:

• Local Storage Encryption: Data stored on your device is protected by iOS security features
• No Server Storage: Since we don't store data on servers, there's no risk of server breaches
• Secure Purchase Validation: In-app purchase receipts are validated using Apple's secure APIs
• Code Security: Regular security audits and updates to address vulnerabilities
• No Network Transmission: Your personal data never leaves your device

However, please note that no method of electronic storage is 100% secure. While we strive to protect your information, we cannot guarantee absolute security. You are responsible for maintaining the security of your device, including using device passcodes and keeping your iOS updated.

👶 6. Children's Privacy

Ketuo is designed to be safe for users of all ages, including children under 13. We are committed to complying with the Children's Online Privacy Protection Act (COPPA).

6.1 COPPA Compliance

• We do not knowingly collect personal information from children under 13
• No registration or account creation is required
• All data is stored locally on the device
• In-app purchases require parental authorization through Apple's Family Sharing
• No advertising or third-party tracking

6.2 Parental Controls

Parents and guardians can:

• Use iOS Screen Time to monitor and limit app usage
• Disable in-app purchases through iOS Restrictions
• Review calculation history stored locally on the device
• Delete the app and all associated data at any time

🌍 7. International Data Transfers

Since Ketuo stores all data locally on your device and does not transmit personal information to external servers, there are no international data transfers. The App can be used anywhere in the world without data crossing borders.

For users in the European Economic Area (EEA), United Kingdom, or Switzerland, this means your data remains within your jurisdiction and is not subject to international transfer regulations.

⚖️ 8. Your Privacy Rights

Depending on your location, you may have certain rights regarding your information:

8.1 General Rights

• Access: You can access all your data directly within the App
• Deletion: You can delete your data by clearing app data or uninstalling the App
• Portability: Your data is stored in standard formats on your device
• Correction: You can modify your preferences and settings within the App

8.2 California Privacy Rights (CCPA)

If you are a California resident, you have additional rights under the California Consumer Privacy Act (CCPA):

• Right to know what personal information is collected
• Right to delete personal information
• Right to opt-out of the sale of personal information (we don't sell data)
• Right to non-discrimination for exercising your rights

8.3 European Privacy Rights (GDPR)

If you are in the European Economic Area, you have rights under the General Data Protection Regulation (GDPR):

• Right of access to your personal data
• Right to rectification of inaccurate data
• Right to erasure ("right to be forgotten")
• Right to restrict processing
• Right to data portability
• Right to object to processing

Since we don't collect or process personal data on our servers, most of these rights are automatically satisfied by our privacy-first design.

🍪 9. Cookies and Tracking Technologies

Ketuo does not use cookies, web beacons, or any tracking technologies. We do not track your activity across other apps or websites. The App functions entirely offline without requiring internet connectivity for core features.

📱 10. Device Permissions

Ketuo requests minimal device permissions to function properly:

We do not request access to your camera, microphone, contacts, location, or any other sensitive device features.

🔄 11. Data Retention

Since all data is stored locally on your device:

• Data is retained indefinitely until you delete it or uninstall the App
• You have complete control over data retention
• We do not have access to or control over your locally stored data
• Clearing app data or uninstalling the App permanently deletes all information

🔔 12. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices, technology, legal requirements, or other factors. When we make changes, we will:

• Update the "Last Updated" date at the top of this policy
• Notify users through an in-app notification for material changes
• Post the updated policy within the App and on our website

We encourage you to review this Privacy Policy periodically. Your continued use of the App after changes are posted constitutes your acceptance of the updated Privacy Policy.

🛡️ 13. Data Breach Notification

In the unlikely event of a data breach affecting user information, we will:

• Notify affected users within 72 hours of discovering the breach
• Provide details about what information was affected
• Explain steps we are taking to address the breach
• Offer guidance on protective measures users can take

However, since we don't store personal data on our servers, the risk of a data breach affecting your information is minimal.

❓ 14. Questions and Concerns

If you have any questions, concerns, or requests regarding this Privacy Policy or our privacy practices, please don't hesitate to contact us. We are committed to addressing your privacy concerns promptly and transparently.

You have the right to:

• Ask questions about our data practices
• Request clarification on any aspect of this policy
• File a complaint with relevant data protection authorities
• Request information about how your data is handled

📋 15. Compliance and Certifications

Ketuo is committed to complying with applicable privacy laws and regulations, including:

• Children's Online Privacy Protection Act (COPPA)
• California Consumer Privacy Act (CCPA)
• General Data Protection Regulation (GDPR)
• Apple App Store Guidelines
• Federal Trade Commission (FTC) Guidelines