Bookbliss Privacy Policy
Last updated: 2026-10-19
TL;DR: Bookbliss collects nothing about you. Your books, reading log, goals, and statistics live in your device's local storage. There are no accounts, no servers of ours, no ads, and no analytics that report to us. Only two things ever leave your device: an ISBN you choose to look up, sent to Open Library to fetch that book's details and cover, and — on Android only — basic diagnostics that the barcode scanner's Google ML Kit component sends to Google (see Camera). Never your library, your photos, or the images the scanner sees. If you email us for support, we receive what you send (see Support emails).
What we collect
Nothing personal. Bookbliss does not require an account, does not transmit your library to any server of ours, and does not contain any advertising or crash-reporting SDKs, or analytics that report to us. The one third-party component that sends anything on its own is Google ML Kit, which reads barcodes on Android — see Camera below. The only time we receive anything is when you email us.
Where your data lives
All books, reading history, goals, collections, genres, notes, ratings, and the cover images you add are stored locally in your device's app sandbox using SQLite and the app's private files. Nothing is uploaded.
Book lookups
When you scan a barcode or enter an ISBN, Bookbliss sends that ISBN to Open Library (openlibrary.org, a project of the Internet Archive) to fetch the book's title, author, and cover image. Like any web request, this reveals your device's IP address to Open Library. Nothing else about you or your library is sent, lookups happen only when you trigger them, and results are cached on your device. Open Library's handling of requests is described in the Internet Archive's privacy policy.
Purchases
The Pro unlock is an In-App Purchase processed entirely by Apple (App Store) or Google (Google Play) under their own terms and privacy policies. We never see your payment details. The app keeps a record of the purchase on your device so that Pro keeps working offline; it is not sent anywhere else.
Backup files
Export Library (in Settings) creates a JSON backup file on your device, which you choose where to save (for example: Files, iCloud Drive, email). We do not see, store, or transmit this file. Import Library reads from a file you select; processing happens entirely on-device.
iOS users with iCloud Backup enabled and Android users on Google Auto Backup will have Bookbliss data automatically backed up to their personal cloud storage by the operating system. This is a system-level feature; Bookbliss has no access to or visibility into these backups. On Android, cover images are left out of that cloud copy so your library always fits within Google's backup limit; after a restore, covers found by ISBN load again from Open Library.
Permissions
- Camera — only while the barcode scanner is open, to read a book's barcode. Camera frames are processed on-device and are never stored or transmitted. On iPhone, barcodes are read by Apple's built-in camera framework and nothing is sent. On Android, barcodes are read by Google's ML Kit, which sends Google diagnostic information about the scanner: device model and OS version, the app's name and version, a per-installation identifier that is not meant to identify you or your device, and performance metrics and error codes. Google encrypts this in transit, uses it for diagnostics and to improve ML Kit, and does not share it with third parties — see Google's ML Kit data disclosure.
- Photos — only when you choose a cover image from your photo library. The selected image is copied into the app's private storage; no other photos are accessed.
- File access — only when you tap Export Library or Import Library. You select the file, the OS hands it to the app, and Bookbliss has no access to other files on your device.
Support emails
Contact Support (in Settings) opens a draft in your own mail app. Below your message, the draft lists the app version, your OS version, your device model (Android only), and whether Pro is unlocked, so we can look into your issue without asking. If the app hits an unexpected error, its error screen offers Email Support, which opens the same draft with a technical error report added: the error message and where in the app's code it happened. You can edit or delete any of those lines before sending. If you send it, we receive your email address, your message, and whatever the draft still contains. We use it only to answer you, and we never sell or share it.
Keeping and deleting your data
- Your library stays on your device until you delete it. Remove individual books in the app, or uninstall Bookbliss to delete everything. Backup files you exported are yours to keep or delete.
- Support emails are kept only as long as we need them to help you. Email avgur.support@gmail.com and we will delete yours.
- ML Kit diagnostics (Android only) are held by Google under its ML Kit data disclosure. We never receive them.
Children
Bookbliss does not knowingly collect data from children — because Bookbliss does not collect data from anyone.
Changes to this policy
If this policy ever changes, we'll update the "Last updated" date above. For material changes (e.g. if Bookbliss ever adds a feature that does collect data), we will notify users in-app before the change takes effect.
Contact
Questions or concerns? Email avgur.support@gmail.com.