Privacy Policy — Gospel Library

Last updated: July 2026

Gospel Library ("the app") is a shared library catalog that lets members of a church browse the collection, check items out, and return them. This policy explains what information the app handles and why. It is written to be plain and honest — the app is a small community tool, not a commercial product.

Developer: Sundar Udaiappan

Contact: alagusundaramu@gmail.com

Information we collect

When you create an account and use the app, we store:

Your email address — used to sign you in and to send you library reminders.
Your name — shown next to items you check out, so the library knows who has what.
Your library activity — which items you have checked out, the checkout date, and the due date.

We do not collect your location, contacts, photos, advertising identifiers, or any analytics or usage-tracking data. The app contains no advertising and no third-party trackers.

### Camera

If you are a library administrator, the app can use your device camera to scan an ISBN barcode when adding a book to the catalog. The camera is used only for live scanning at that moment. No photo or video is taken, stored, or transmitted.

How your information is used

To authenticate you when you sign in.
To operate the lending library — recording checkouts and returns and showing who currently holds an item.
To email you reminders when an item you have is overdue.

We do not sell, rent, or share your personal information with anyone for marketing, and we do not use it for advertising.

Where your information is stored (third-party services)

Google Firebase (Authentication and Cloud Firestore). Your account and library data are stored securely on Google's Firebase servers. Access is restricted by security rules so that only signed-in members and library administrators can read the appropriate data. See Google's privacy policy at https://firebase.google.com/support/privacy.
Overdue reminder emails are sent from a Google account operated by the library, using Google Apps Script / Gmail. Only the recipient's email address and the overdue item's title appear in the reminder.
Book information lookups. When an administrator scans or types an ISBN, the app looks up the book's title, author, and cover from Open Library (openlibrary.org) and, as a fallback, Google Books. Only the ISBN is sent to these services — never any personal information about you.

Data is encrypted in transit (HTTPS).

Data retention and deletion

Your data is kept for as long as you have an account with the library. To have your account and associated personal data deleted, contact the library administrator or email alagusundaramu@gmail.com, and your account and personal information will be removed from the library's Firebase database.

Children's privacy

The app is intended for members of a church community and is not directed at children under 16. We do not knowingly collect personal information from children under 16.

Changes to this policy

If this policy changes, the "Last updated" date above will be revised. Significant changes will be communicated through the library.

Contact

Questions about this policy or your data: alagusundaramu@gmail.com