Privacy policy

Last updated: October 3, 2026

Effective October 3, 2026. This policy covers Gray Matter for iPhone and iPad, published by Coviet, and this public Coviet website.

We do not collect personal data through the Gray Matter app. Your coloring progress, undo and redo history, replay timing, optional notes, settings, and selected language stay on your device. The iPhone and iPad app stores them in local app storage and does not send them to a Gray Matter server.

If you choose Save in the app, it can add the requested picture or replay video to Photos. iOS asks permission first. Gray Matter does not read existing Photos, files, or videos.

The app has no accounts, advertising, analytics, crash-reporting service, in-app purchases, or cloud sync. It works offline after installation.

The app does not ask for a child’s name or contact details and does not intentionally collect personal information from children or anyone else. There is no chat or social sharing feature.

App data remains in Gray Matter storage on your iPhone or iPad; we cannot access it remotely. Device backups may include it according to your settings. We do not keep another copy on our servers.

Choose Erase all progress in Options or delete Gray Matter to remove its local progress and notes. Items already saved to Photos must be deleted there. A device backup may retain a copy until you remove that backup.

If you email support, your address and the message or details you choose to include are processed to answer you. The email services involved in sending and receiving the message may retain their own copies or backups. We remove support messages from our active mailbox when they are no longer needed to handle the request, unless we need to keep them for an ongoing issue or a legal obligation. You can ask us to delete our copy at danghoang.jp@icloud.com.

This policy page is hosted on Vercel. To deliver and secure the site, Vercel may process request details such as an IP address, browser information, and timestamps under its own privacy notice. Coviet does not add advertising or analytics trackers to this site. Vercel’s notice is at https://vercel.com/legal/privacy-notice.

For privacy questions or a request to delete support correspondence, contact danghoang.jp@icloud.com. If our data practices change, we will update this policy before a changed app version is released.