DouDizhu Shifu

Privacy Policy

Effective and last updated: October 12, 2026

DouDizhu Shifu is provided by Shanghai Lingsihuan Information Technology Co., Ltd. (Inspirix). This policy covers the app, these product and support pages, and information you voluntarily send to support. Learning records are not uploaded to Inspirix.

Your learning stays with you. No app account, developer backend, advertising, analytics SDK, or tracking; learning and table records are stored locally.

Privacy at a glance

  • Learning records remain on your device
  • Reports leave only through sharing you initiate
  • Apple handles one-time purchases and restoration
  • Reset progress without cancelling a purchase

1. On-device learning data

The app stores lesson results, practice attempts, focused-practice completion, skill evidence, preferences, and one active game in its local app container. It has no developer backend, app account, chat, advertising identifiers, advertising, analytics SDK, or third-party tracking. We do not receive learning records through app use or sell or share them for advertising.

2. Apple purchases

Apple handles payments and purchase records under its own terms and privacy policy. StoreKit checks verified Foundation ownership, restoration, and changes to access, including revocation. The app does not receive payment-card credentials or your Apple Account password. Foundation is one non-consumable purchase, not a subscription. Product loading, buying, and restoration require an App Store connection; lessons and games work offline.

3. Sharing, retention, and deletion

A learning report leaves the app only when you choose a destination in the system share sheet. It may contain detailed progress and practice history, so review it before sharing. Local learning and table records remain until you reset progress or remove app data. Settings > Reset learning progress removes the app’s saved learning and table records, not an Apple purchase. Deleting the app removes its local container according to iOS behavior; device backups may retain data according to your settings. Previously shared or saved reports must be deleted at their destination. Restoring a purchase restores access, not deleted learning history. There is no developer cloud sync or remote recovery.

Preparing a learning report creates a temporary JSON file on the device. Preparing a new report overwrites that file; iOS manages temporary storage. Reset learning progress does not itself erase a previously prepared temporary report or copies saved or shared elsewhere. Removing the app removes its local temporary container according to iOS behavior.

4. Permissions, security, and backups

The current app does not need camera, microphone, location, contacts, photo-library, or tracking permission for lessons and games. App records stay in iOS-controlled storage. Protect access to your device; Apple-managed device or iCloud backups follow your settings and Apple’s policies. No storage or transmission is absolutely secure. We cannot remotely view, retrieve, or delete on-device records.

5. Support correspondence and requests

When you email [email protected], we receive the email address, message, and optional attachments you send. We and our email delivery providers use them to respond, investigate issues, prevent abuse, and meet legal record-keeping obligations, not for advertising or resale. We keep correspondence only as reasonably necessary for these purposes, then delete or de-identify it. Contact us to request access, correction, or deletion of support information, subject to applicable legal obligations. Do not send passwords, payment details, or Apple Account credentials.

6. Website requests and external services

These public pages require no login or submission of learning data. Website hosting and delivery providers may process technical requests, including IP address, requested page, browser headers, and access times, to deliver and protect the site under their policies. This is separate from the app’s local learning data. Apple service and license links open external resources governed by their own policies; a sharing destination you choose controls the report it receives.

7. Children and content

The app has no messaging, wagering, cash prizes, or user-generated content. It does not ask for a user’s age or create profiles for advertising. The applicable age rating is shown by the App Store when available; an educational card app does not itself imply a particular rating. Guardians should supervise purchases and report sharing. Contact us if a child has sent personal information to support so we can review and remove it as appropriate.

8. Policy changes

We will publish policy changes here with an updated effective date. If a future version adds developer collection, cloud services, analytics, or tracking, we will update the app disclosures and this policy and obtain permission where required before that processing begins.

Contact us

Contact [email protected] for product, technical, purchase-access, or privacy questions. No app account or purchase is required to contact us.

[email protected]