Privacy Policy

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

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

Data Collection

Stacks 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.

Analytics

To help us improve the app, we use TelemetryDeck to collect anonymous usage data. This data helps us understand how the app is used without identifying you personally.

TelemetryDeck does not collect any personally identifiable information (PII). It does not track your IP address, device ID, or any other data that could be traced back to you.

You can view TelemetryDeck’s privacy policy here.

Third-Party Services

Stacks 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 Stacks.

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

Stacks includes settings to export your library as CSV and to delete all app library data and app preferences from the app.

Contact Us

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