FeiCore Privacy Policy

Effective and updated: October 18, 2026
Applies to version: 1.0.0
Developer: Gao Feirong (高飞荣, 子义飞云)
Contact: zyfly_app@qq.com

FeiCore is a local journal for subjective mental energy experiences, available as a one-time paid download. It has no subscriptions, in-app purchases, accounts or ads. This policy distinguishes data handled inside the app from information involved when you choose to visit a website or contact support.

Local data

Your drain and recovery entries, subjective impact levels, journal points, notes, timestamps, custom activities and appearance preferences are stored on your device. Statistics are calculated locally. The dictionary is included with the app. Logging, dictionary browsing and statistics work without an internet connection.

The app has no developer backend, cloud sync, third-party SDKs, ads, analytics reporting or tracking code. It does not automatically send entries, device identifiers or usage behavior to the developer. The developer cannot access your local entries through the app.

Permissions

FeiCore does not request system permissions for photos, location, microphone, contacts, notifications or similar access. It does not integrate with HealthKit or Apple Watch, or read physiological data such as sleep or heart rate.

Websites you choose to open

When you select a privacy, support or reference link, the system browser opens the relevant website and uses an internet connection. FeiCore does not attach your entries, notes or journal points to these URLs. Your browser and the destination website may process ordinary access information, such as your IP address, under their own policies. This is separate from offline logging inside the app.

Support emails you choose to send

If you email support, we receive your email address and the message content you choose to provide, and use them to respond to and handle your request. You do not need to send personal journal entries or sensitive information. Remove information you do not wish to share from attachments and screenshots. You may use the same contact address to request deletion of personal information we retain in support correspondence.

Deletion and system backups

You can edit or delete individual entries, or clear local records in Settings. Deleting the app removes its local app data from the current device. FeiCore provides no app-managed export, backup, restore or cross-device sync feature.

iOS iCloud backups, computer backups or device migration may include app data. Their availability, retention, deletion and restoration are managed through your system settings and Apple's services. Clearing entries or deleting the app does not delete existing system backups. The developer cannot view or manage those backups.

Content and scope

The journal balance is only an aggregate of subjective journal points. It is not a measurement of real energy, a psychological assessment or a health indicator. FeiCore provides no diagnosis, treatment or personalized medical advice. We do not collect data through the app from users of any age or create child accounts.

Changes and contact

If functionality or data handling changes, this page will display an updated date. For questions about this policy or data handling, contact zyfly_app@qq.com.