Last Updated: 2026-01-29
Castle Software takes user privacy seriously.
This app is designed to function entirely on your device, and no personal data is collected, stored, or transmitted to any server.
Information Collection
The app does not collect, store, or transmit any personal information.
All data you enter or create within the app remains on your device only.
Data Storage and Deletion
All app data is stored locally on your device.
You may delete your data at any time using the in‑app Delete All Data option or by clearing the app’s storage through your device settings.
Once deleted, your data cannot be recovered.
Data Transfer Between Devices
The app allows you to move your data between devices using the import and export features.
When you export your data, a file is created and saved to a location you choose on your device.
You may then transfer this file to another device using any method you prefer (such as email, cloud storage, or a physical transfer).
When you import data, the app reads only the file you select and stores the information locally on that device.
All import and export actions are initiated manually by you. The app does not automatically transfer, upload, or sync any data at this time.
Internet Access
The app does not require an internet connection for its core functionality. However, certain optional features, such as downloading book cover images or searching for books online to add to your library or wishlist, do require internet access.
No data is sent to external servers, and no online services are used for core functionality.
Access to Files, Photos, and Media
The app only accesses files, photos, or media when you choose to import or export data or images.
These actions occur with your direct interaction and are never performed automatically.
Camera Access
The camera is used solely for scanning barcodes when you choose to use that feature.
The app does not record, store, or transmit any camera data.
Third‑Party Services
The app does not use analytics tools, advertising networks, tracking technologies, or third‑party data processors.
Children’s Privacy
Because the app collects no data, it is safe for users of all ages.
However, children should use the app under appropriate supervision when managing device files or camera features.
Changes to This Policy
If this privacy policy is updated in the future, changes will be reflected here, and you will be notified in the app.
Contact
If you have questions about this privacy policy, you may contact the developer at: bookcollector.support@protonmail.com