Privacy Policy

Margin Bound

Last updated: October 19, 2026

Margin Bound is a private reading tracker that lets you log books, track reading progress and jot margin notes — entirely on your device. This policy describes what Margin Bound does and does not do with your data. The short version: your data stays on your device, and we collect nothing.

1Information we collect

Margin Bound does not collect, transmit or store any personal information on external servers. The app runs entirely offline. There are no accounts, no sign-ups, no analytics and no crash reporters. We have no server infrastructure that receives data from the app.

2Data stored on your device

To make the app work, Margin Bound stores the following only on your device, using the operating system's local storage:

  • Your book library (titles, authors, page counts, cover thumbnails)
  • Reading sessions and progress (pages read, dates, duration)
  • Margin notes and highlights you create
  • Reading statistics and charts data
  • App preferences and display settings (theme, sort order, view mode)

This data never leaves your device. It is not uploaded to Margin Bound or to any third party. Uninstalling the app or clearing its storage deletes all of it permanently.

3Permissions

Margin Bound does not request any special device permissions. The INTERNET permission present in debug builds is a Flutter framework default and is not included in the release version distributed through the Play Store. The app never opens a network connection.

4Network use

Margin Bound makes zero network requests. It does not contact any server, API or remote endpoint. The app functions identically in airplane mode. No data is ever transmitted from the app.

5Third-party services

Margin Bound does not integrate any third-party SDKs, analytics services, advertising networks, crash reporters or social-media plugins. No third party receives data from or through this app.

6Children's privacy

Margin Bound does not collect personal information from anyone, including children under 13. The app contains no advertising, no in-app purchases and no social features. It is suitable for all ages.

7Your rights

Because all data resides exclusively on your device, you are in full control. You can view, edit or delete any entry within the app at any time. To remove all data, simply uninstall the app or clear its storage through your device settings. No request to us is needed.

8Changes to this policy

If this policy ever changes, the "Last updated" date at the top of this page will be revised. Material changes will be noted in the app's release notes.

9Contact

If you have any questions about this policy, please reach out: [email protected]