Privacy Policy

Last updated: 2026-05-29T00:00:00.000Z

Dewey takes your privacy very seriously. We believe your reading history, private notes, and library are personal and should remain private.

Data Collection

Dewey does not collect personal reading data.

We do not have servers that store your books, reading sessions, notes, covers, ratings, or reading history. All library data is stored locally on your device and synced via your personal iCloud account if enabled. We do not have access to any of your content.

Anonymous Usage Analytics

Dewey requests permission through Apple’s App Tracking Transparency prompt after onboarding. Anonymous analytics are collected only when you authorize that system prompt. If permission is denied or restricted, analytics remain disabled. You can manage this permission in iOS Settings > Privacy & Security > Tracking.

Analytics events only include low-cardinality, bucketed values such as screen names or coarse session-duration ranges. No book titles, authors, notes, ratings, ISBNs, search text, or other content you enter is sent.

Analytics are not linked to your identity, Apple ID, name, email, or any advertising identifier. Dewey does not track you across other apps or websites.

When you authorize analytics, Dewey generates a random, app-only installation ID on your device solely to group analytics events within Dewey. It is not derived from personal information and is removed when you reset app data.

TelemetryDeck is the analytics provider. You can view TelemetryDeck’s privacy policy here.

Dewey does not include crash-reporting or performance-monitoring analytics SDKs, and it does not collect crash stack traces or diagnostic reports.

Third-Party Services

Dewey uses the Google Books API for book lookup. When you search by title, author, or ISBN, or scan a barcode, that lookup request is sent to Google so matching book metadata can be returned. Your saved library, reading sessions, and private notes are not sent to Google by Dewey.

If iCloud sync is enabled, Apple handles syncing your library through your personal iCloud account. We do not have access to your iCloud data.

Data Control

Dewey includes settings to export your library as CSV and delete all app library data and app preferences from the app. You can manage analytics permission in iOS Settings > Privacy & Security > Tracking. Deleting app data also removes the anonymous analytics ID.

Contact Us

If you have any questions about this Privacy Policy, please contact us at hello@lachlaneagling.com.