Updated July, 2026

Data Collection

The Four Books App does not collect, store, or transmit any personal data to external servers. All app data (bookmarks, reading preferences, viewed verses) is stored locally on your device.

Third-Party Services

Our apps do not use any third-party analytics, advertising networks, or tracking services.

Sync & Backup

On Apple devices, if you have iCloud enabled, your bookmarks and reading progress sync across your devices through Apple's iCloud Key-Value storage. This data is governed by Apple's privacy policy. On Android devices, your bookmarks and reading progress are included in Android's automatic backup to your own Google Drive account, so they survive reinstalls and device changes. This data is governed by Google's privacy policy. In both cases the data belongs to your personal Apple or Google account — we never see it.

In-App Purchases

Purchases are processed through Apple's App Store or Google Play. Payment information is handled entirely by Apple or Google and is not accessible to us.

Data Retention & Deletion

Since no data is collected by us, there is no data to delete. To remove local app data, uninstall the app from your device.

Contact

Questions? Contact us at support@daoxue.academy.