Chapter Stack Privacy Policy

Last updated 13 November 2026

Chapter Stack is made by ENTR0ZY. This policy explains what happens to your information when you use the app on iPhone, iPad or Android.

The short version

Chapter Stack does not collect, store or share any of your data. There is no account and no sign-up, and the app works fully offline. Your writing never leaves your device unless you send it somewhere yourself.

Your books

When you open a document, Chapter Stack reads only the file you picked. Your book, your changes and your settings are kept only on your device. We can't see them.

Saved copies

Copies you save go into the app's own folder on your device (on iPhone and iPad: Files → On My iPhone → Chapter Stack). The original file is never overwritten.

Sharing

Copies you share or open in another app go only where you send them, through your device's own share sheet.

No tracking

Chapter Stack has no ads, no analytics, no crash reporting and no tracking of any kind.

Children

Chapter Stack does not knowingly collect information from anyone, including children.

Deleting your data

Delete saved copies in the Files app, or uninstall the app to remove everything it stored.

Changes

If this policy changes, the new version will be posted on this page with a new date.

Contact

Questions: entrozy@protonmail.com