1. Introduction
SignCascade UD (hereinafter "we" or "our business") respects the privacy of all users of our website (signcascade-ud.jp) and mobile applications (hereinafter "the Service") and is committed to protecting personal information. This Privacy Policy explains what information the Service collects and how it is used.
2. Scope
This policy applies to the following services:
- Website: signcascade-ud.jp and all subdirectories
- Manabi Palette (free printable worksheets, educational games, and classroom tools)
- Shunsoku Master (IT Passport exam preparation app / "Shunsoku IT Passport")
- Koe Palette (AAC assistive communication app)
- Other applications and web services provided by us
3. Information We Collect
3-1. Information Collected via Apps
| Item | Description |
|---|---|
| Advertising ID | Google Advertising ID (GAID) — Used for ad delivery optimization and performance measurement (via Google AdMob) |
| Device Information | OS version, device model, screen size, etc. — Used for ad delivery optimization |
| Learning Data | Learning progress, answer history, review schedule, etc. — Stored only on the device (SharedPreferences); never transmitted externally |
| App Settings | Theme, notification preferences, etc. — Stored only on the device |
| App Usage Data | Screen transitions, learning progress, quiz accuracy, etc. — Collected anonymously via Firebase Analytics (Google) for service improvement |
| Crash Logs | Stack traces, device model, and OS information at the time of app crashes — Automatically sent via Firebase Crashlytics (Google) for quality improvement |
| Feedback Information | Category, message content, problem ID, device information, email address (optional) — Sent to our server for support purposes |
3-2. Information Collected via Website
| Item | Description |
|---|---|
| Analytics | Google Analytics 4 (GA4) — Anonymous statistics including page views, time on site, referral URLs, browser type, etc. |
| Cookies | Theme preference storage, analytics, and ad delivery |
| Contact Information | Email address, device information, and message content submitted via contact forms |
4. Purpose of Use
We use collected information only for the following purposes:
- Providing, improving, and fixing issues with our services
- Delivering advertisements and measuring their effectiveness
- Statistical analysis of usage patterns
- Responding to inquiries
5. Advertising
5-1. In-App Advertising (Google AdMob)
Our apps use Google AdMob to deliver advertisements. The Google Advertising ID and device information may be used for ad optimization.
Ads are not displayed during active learning or quiz sessions, ensuring they do not interfere with the learning experience.
5-2. Website Advertising (Google AdSense)
Our website may use Google AdSense to deliver advertisements. Ad networks may use cookies to display ads based on user interests.
If you do not wish to receive personalized ads, you can opt out via the Google Ads Settings page.
6. Analytics
Our website uses Google Analytics 4 (GA4) to anonymously collect and analyze access data.
7. Cookies
Our website uses cookies and local storage for the following purposes:
- Remembering theme preferences (light/dark mode)
- Managing cookie consent status
- Access analytics via Google Analytics 4
- Ad delivery via Google AdSense
You can refuse cookies through your browser settings, but some features may be limited as a result.
8. Disclosure to Third Parties
We do not provide personal information to third parties except in the following cases:
- When consent has been obtained from the user
- When required by law or legal process
- Technical transmission to advertising and analytics services (limited to use as third-party services)
9. Third-Party Services
| Service | Provider | Purpose | Privacy Policy |
|---|---|---|---|
| Google AdMob | Google LLC | In-app advertising | Link |
| Google AdSense | Google LLC | Website advertising | Link |
| Google Analytics 4 | Google LLC | Website analytics | Link |
| Firebase Analytics | Google LLC | In-app usage analysis | Link |
| Firebase Crashlytics | Google LLC | App crash reporting | Link |
10. Data Storage and Security
- App learning data is stored only on the device and is never transmitted to external servers.
- Contact information is retained solely for support purposes and is deleted after a reasonable period following resolution.
- We implement appropriate technical and organizational security measures to protect information from unauthorized access, loss, or leakage. However, as no internet transmission is completely secure, we cannot guarantee 100% information security.
- All communications between the Service and our servers are encrypted using SSL/TLS (HTTPS).
11. Children's Privacy
Our services are designed with safety in mind for educational purposes. We do not intentionally collect personal information from children under 16. If we become aware that personal information has been collected from a child under 16, we will promptly delete it.
12. User Rights
- App Learning Data: Can be deleted via your device's "App Settings" → "Storage" → "Clear Data."
- Advertising ID: Can be reset or disabled through your device settings.
- Personal Information Provided via Contact: You may request disclosure, correction, or deletion.
12-1. Data Deletion Requests
If you wish to request data deletion, please send an email to contact@signcascade-ud.com with the subject line "Data Deletion Request." We will process the deletion of your email address and message content submitted via feedback, Firebase Analytics usage data, and information associated with your AdMob advertising ID within a reasonable timeframe.
Please note that the app itself stores user data (such as learning progress) only on the device, and all such data is deleted when the app is uninstalled.
13. Changes to This Policy
We may revise this Privacy Policy without prior notice in response to changes in laws or our services. Revisions take effect upon publication on this page.
14. Contact Us
If you have any questions or concerns regarding this Privacy Policy, please contact us through the following channels:
| Business Name | SignCascade UD |
|---|---|
| Representative | Takio |
| support@signcascade-ud.com | |
| Contact Form | Contact Form |