Last Updated: January 19, 2026

Developer: Twist Theory

1. Introduction

This Privacy Policy explains how Twist Theory ("we," "our," or "us") collects, uses, and protects your personal information when you use the Takken-shi Quiz 2026 mobile application (the "App"). This App is designed to help users prepare for the Japanese Real Estate Transaction Specialist (宅地建物取引士) examination through quiz-based learning.

By using our App, you agree to the collection and use of information in accordance with this Privacy Policy.

2. Information We Collect

2.1 Automatically Collected Information

The App automatically collects the following information:

• Device Information: Device type, operating system version, app version, unique device identifiers
• Usage Data: App usage time, access frequency, quiz session duration, feature usage patterns
• Performance Data: App crashes, errors, and technical diagnostics for stability improvement
• Analytics Data: Aggregated and anonymized usage statistics via Firebase Analytics

2.2 Learning Progress Data

To provide the core functionality of the App, we collect and store:

• Quiz Responses: Your answers to practice questions, correctness, and response time
• Study Progress: Chapters and sections completed, overall progress percentage
• Performance Metrics: Accuracy rates by chapter and section, improvement trends
• Spaced Repetition Data: Review schedules, memory retention patterns, due question lists
• Weak Section Analysis: Automatically identified areas needing improvement based on your performance
• Study History: Timestamps of study sessions, questions reviewed, daily/weekly activity

2.3 In-App Purchase Information

If you choose to upgrade to the Premium version:

• Purchase Records: Managed by Apple App Store or Google Play Store (depending on your platform), not directly by us
• Premium Status: Your subscription or purchase status to unlock premium features
• Transaction IDs: For verification and customer support purposes only

Note: We do not collect or store credit card information. All payment processing is handled securely by Apple (for iOS) or Google Play (for Android).

2.4 Push Notification Data

If you enable study reminder notifications:

• Notification Preferences: Your chosen reminder times and frequency
• Device Tokens: Firebase Cloud Messaging tokens to deliver notifications
• Notification Status: Whether notifications are enabled or disabled

You can disable notifications at any time through the App settings or your device settings.

2.5 Advertising Identifier (iOS)

On iOS devices, we may collect the following information for advertising measurement purposes:

• IDFA (Identifier for Advertisers): A unique identifier assigned by Apple to your device, used to measure the effectiveness of advertising campaigns
• Ad Attribution Data: Information about which advertisement led you to install the App

2.6 Information We Do NOT Collect

We do not collect the following information:

• Personal identification information such as name, address, or phone number
• Precise location data (GPS)
• Contact information or address book
• Camera, microphone, or photo library access
• Social media profiles or accounts
• Biometric data

3. How We Use Your Information

We use the collected information for the following purposes:

3.1 Core App Functionality

• Providing quiz questions and tracking your answers
• Saving and syncing your learning progress across app sessions
• Calculating accuracy rates and performance statistics
• Generating personalized study recommendations

3.2 Premium Features (For Paid Users)

• Spaced Repetition Learning: Scheduling optimal review times based on memory science
• Weak Section Analysis: Identifying and focusing on areas where you need improvement
• Full Question Access: Unlocking all 193 questions across 4 chapters and 75 sections
• Ad-Free Experience: Removing advertisements for uninterrupted learning

3.3 Service Improvement

• Analyzing usage patterns to improve app features and user experience
• Identifying and fixing bugs, crashes, and performance issues
• Developing new features based on user behavior and feedback
• A/B testing to optimize learning effectiveness

3.4 Communications

• Sending study reminder notifications (if enabled)
• Providing updates about new features or content
• Responding to your inquiries and support requests

4. Data Storage and Security

4.1 Data Storage Locations

• Local Storage: Most of your learning data is stored locally on your device using AsyncStorage
• Cloud Services: Anonymous usage statistics are stored on Firebase servers (Google Cloud Platform)
• Retention Period: Data is retained until you uninstall the App or manually delete it through App settings

4.2 Security Measures

We implement the following measures to protect your information:

• Industry-standard encryption for data transmission (TLS/SSL)
• Secure local storage with device-level encryption
• Regular security audits and updates
• Access controls to limit data exposure
• Data minimization principles (collecting only what's necessary)

5. Third-Party Services

5.1 Firebase (Google)

We use Firebase services for:

• Firebase Analytics: Anonymous usage statistics and app performance metrics
• Firebase Cloud Messaging: Push notification delivery
• Firebase Crashlytics: Crash reporting and error tracking

Firebase Privacy Policy: https://firebase.google.com/support/privacy

5.2 App Store and Google Play Services

For in-app purchases and billing:

• Payment processing is handled entirely by Apple (for iOS devices) or Google Play (for Android devices)
• We only receive confirmation of successful purchases
• Apple's Privacy Policy or Google's Privacy Policy applies to all payment data, depending on your platform

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

Google Privacy Policy: https://policies.google.com/privacy

5.3 Google Ads (Advertising Measurement)

We use Google Ads services to measure the effectiveness of our advertising campaigns:

• Conversion Tracking: Measuring app installs that result from Google Ads campaigns
• SKAdNetwork: Apple's privacy-preserving framework for measuring ad campaign effectiveness without revealing user-level data

This tracking helps us understand which advertisements are effective and improve our marketing efforts. The IDFA is only collected if you grant permission through the ATT prompt on iOS.

Google Ads Privacy Policy: https://policies.google.com/privacy

5.4 Data Anonymization

All data shared with third-party services is appropriately anonymized or aggregated to prevent personal identification.

6. Your Rights and Choices

6.1 Access Your Data

You can view your learning progress, statistics, and study history within the App at any time.

6.2 Delete Your Data

• Use the "Reset Progress" option in App settings to clear all learning data
• Uninstall the App to remove all locally stored data
• Contact us to request deletion of any data stored on our servers

6.3 Control Notifications

• Enable or disable push notifications in App settings
• Manage notification permissions in your device settings
• Customize reminder frequency and timing

6.4 Manage Premium Subscription

• View and manage your subscription through Apple App Store (iOS) or Google Play Store (Android)
• Cancel your subscription at any time through your device's subscription settings
• Request refunds according to Apple's or Google Play's refund policy, depending on your platform

6.5 Contact Us for Data Requests

For any data-related requests, please email us at twisttheory59@gmail.com with the subject line "Data Request - Takken-shi App".

7. Children's Privacy

The Takken-shi Quiz 2026 App is designed for adults preparing for professional licensing examinations. We do not knowingly collect personal information from children under 13 years of age. If we become aware that a child under 13 has provided us with personal information, we will promptly delete such information.

8. International Data Transfers

Your data may be transferred to and processed on servers located in Japan and other countries where our service providers operate. When we transfer data internationally, we implement appropriate safeguards to protect your information in accordance with applicable data protection laws.

9. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for legal, operational, or regulatory reasons. When we make significant changes, we will:

• Update the "Last Updated" date at the top of this policy
• Notify you through the App or via push notification
• Provide a summary of key changes

Your continued use of the App after such modifications constitutes acceptance of the updated policy.

10. Applicable Law

This Privacy Policy is governed by and construed in accordance with the laws of Japan, specifically the Act on the Protection of Personal Information (個人情報保護法).

11. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or our data handling practices, please contact us:

© 2025 Twist Theory. All rights reserved.