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 can collect anonymous, aggregated usage signals to help us improve the app. This is optional and disabled until you explicitly opt in.

No analytics are sent before you consent. Dewey asks for your choice during onboarding, and if you decline, nothing is sent.

You can change your mind at any time in Settings -> Privacy -> Anonymous Analytics. Turning the toggle off stops analytics immediately and rotates the anonymous installation ID so future events are no longer grouped with earlier ones from your device.

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.

If you opt in, 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 rotated whenever you opt out or 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, manage analytics consent in Settings -> Privacy -> Anonymous Analytics, and delete all app library data and app preferences from the app. 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.