Overview
Cast Jiaobei (the “App”) is a digital presentation of the jiaobei tradition for personal record-keeping and reflection, provided by Shanghai Wangyue Huishi Technology Co., Ltd. This Privacy Policy explains how the App handles information.
The App is local-first. It does not require an account, contain advertising or analytics SDKs, or use a developer-operated backend to collect App data. We do not sell your personal information or use your App activity to track you across apps or websites.
The Android version does not request the Internet permission for App networking. At launch, when the App returns to the foreground, and when you open or use purchase features, Google Play Billing may communicate through the Play Store system service to retrieve product information and reconcile purchase entitlements.
Data Stored on Your Device
Questions you enter in Ask, cast outcomes, dates, notes, selected themes, App settings, and a local Premium entitlement state are stored on your device. Quick Cast sessions are not saved to history. The App does not upload this content to our servers.
On iOS, history can be included in iCloud Backup or a computer backup of your device, depending on your backup settings. On Android, history is excluded from cloud backup and device transfer. You should still protect your device and backups because anyone who can unlock them or access the App data may be able to view this content.
Motion Sensors
When you actively enable motion casting or enter its Ready state, the App uses device motion sensors such as the accelerometer and gyroscope to recognize a shake, turn, or similar gesture and to contribute randomness to a virtual outcome. Raw sensor samples are processed briefly in device memory, reduced to motion features, and discarded. They are not saved, uploaded, or used for advertising or analytics. You can use the on-screen controls without enabling motion sensing.
Biometrics and Device Authentication
If you enable history lock, the App asks the operating system to authenticate you using Face ID, Touch ID, biometrics, or a device credential. Authentication is performed by your device and operating system. The App receives only a success, failure, or cancellation result and cannot access or store your facial image, fingerprint template, or device passcode.
Sharing
The App creates a result image and opens the system share interface only when you choose to share. Questions are excluded by default; you may explicitly choose to include a question in the image. After you send it, the receiving app, service, or person handles that image under their own privacy practices, which we do not control. On Android, generated share images are kept briefly in the App cache and automatically cleaned up. On iOS, share images are generated in memory and handed to the system share interface.
Purchases
If you purchase Lifetime Premium, the transaction is processed by the purchase platform, such as the Apple App Store or Google Play. The App uses the platform’s purchase service to request product information, start a purchase, and confirm an entitlement for the device or platform account. We do not receive or store your payment card details. The platform may process purchase account details, transaction identifiers, region, and diagnostics under its privacy policy and may provide us with limited transaction or aggregated information.
Diagnostics and Platform Services
The App does not contain an analytics or crash-reporting SDK controlled by us. Apple, Google, your device manufacturer, or the operating system may independently process crash reports, performance data, download information, or other diagnostics according to your device and platform settings, and may make limited or aggregated reports available to developers. Those platform activities are governed by the relevant platform’s privacy policy.
When You Contact Us
If you email support, we receive the email address, message, and any information you choose to include. We use it only to respond, troubleshoot, and improve the App. Please do not send unnecessary sensitive information. We retain support correspondence for as long as reasonably needed to handle the request and may delete or retain it as required by applicable law or legitimate business needs.
Retention, Deletion, and Security
History remains on your device until you delete a record in the App, clear App data, or uninstall the App. App settings and the local entitlement cache are generally deleted when you clear App data or uninstall; the platform may retain a purchase record so that purchases can be restored under its rules. Copies contained in an existing device backup, shared, exported, or saved by another person are not affected by deletion inside the App.
We use safeguards consistent with the App’s local-first design, including operating-system-protected storage, an optional history lock, and an app-switcher privacy shield. No storage method can guarantee absolute security, so use a device lock and install security updates promptly.
Children and Guardians
The App is not designed to collect App content from anyone, including children. Users below the age of full legal consent in their region should use the App, manage device permissions, and make purchases only with a parent’s or guardian’s consent and supervision. Children should not provide personal information through support email without that consent.
Changes to This Policy
We may update this Privacy Policy from time to time. The updated version will be posted on this page with a revised effective date. If a change is material, we will provide additional notice where required by law.
Contact Us
For privacy questions or requests, contact Shanghai Wangyue Huishi Technology Co., Ltd. at contact@wangyuehuishi.com.