SignCascade UD ("we," "us," or "our") respects the privacy of users of "Koe Palette" (the "App") and is committed to protecting personal information. This Privacy Policy explains what information the App handles and how it is used.
The App does not perform usage analytics, collect crash logs, or serve advertisements. No record of how you use the App reaches us.
Everything you create and configure in the App is stored on your device.
None of this is transmitted to our servers. We cannot see any of it.
The only information we receive is what you send us directly.
We use information you send us solely for the following purposes:
The following external service communicates directly from your device only if you choose to configure it. It is not configured by default.
| Service | Data Sent | Notes |
|---|---|---|
| Google Gemini API | Text (button labels) → Image generation | You obtain and manage the API key yourself |
This communication goes directly from your device to Google and does not pass through our servers. The data sent is handled under Google's Privacy Policy.
In addition, your device's text-to-speech and voice input features may communicate with their providers (Google, Apple, etc.) depending on your device and OS settings. These are device features and are not operated by us.
We do not disclose your personal information to third parties except in the following cases:
| Data | Stored | Retention |
|---|---|---|
| Button configuration, settings, recorded audio, custom images, API keys | On your device only | Until you delete it |
| Support inquiries | With us | 3 years after resolution |
You have the following rights:
The App is intended for users of all ages. Children should use the App under the supervision of a parent, guardian, or support person. The App does not collect personal information from children.
Because the App does not collect usage data, processing of personal data under the EU General Data Protection Regulation (GDPR) occurs only when you contact us.
To exercise these rights, contact support@signcascade-ud.com.
Because App data is stored on your device, its safety depends on your device security settings. We recommend enabling a screen lock. Support persons can restrict access to settings and editing using the App's PIN lock feature.
We may update this Privacy Policy as needed. If we make a change that affects the scope of information handled, we will notify you within the App.
For questions or comments about this Privacy Policy, please contact us:
This is a translation provided for convenience. In case of any discrepancy, the Japanese version prevails.