Last updated: March 7, 2026
Stacked ("we", "our", or "the app") is a personal library management app developed by Neuvo Web Technologies. This privacy policy explains how we collect, use, and protect your information.
Account Information: When you create an account, we collect your name and email address through Firebase Authentication. If you sign in with Google or Apple, we receive basic profile information from those services.
Library Data: All your library data (books, shelves, readers, issue records) is stored locally on your device using SQLite. This data is not uploaded to our servers.
Camera: The app uses your device camera solely to scan book barcodes (ISBN). No images or video are stored, recorded, or transmitted.
Your library data is stored entirely on your device. We do not have access to your books, shelves, readers, or issue records. If you use the backup feature, the exported file is saved to your device or cloud storage of your choice (e.g., iCloud Drive, Google Drive) — we do not receive or store these backups.
Authentication is handled securely through Google Firebase Authentication.
The app uses the following third-party services:
We do not sell, trade, or share your personal information with third parties. We do not display advertisements. We do not use analytics or tracking tools.
The app is not directed at children under 13. We do not knowingly collect personal information from children under 13.
You can delete your library data at any time by uninstalling the app. To delete your account and associated authentication data, please contact us at [email protected].
We may update this privacy policy from time to time. Any changes will be reflected on this page with an updated date.
If you have any questions about this privacy policy, please contact us at: