Effective date: October 10, 2026
This page explains how to delete your account and request deletion of your data for the
Hollow Chess mobile game, provided by Galactic Toast
(app ID com.galactictoast.fast_chess).
Partly. Hollow Chess has two kinds of play, and they are treated differently:
When you play online, some data is stored on our servers, not only on your device — see the table below.
If you no longer have the app installed, you can delete your account directly from a browser:
Send an email to galactictoast.dev@gmail.com with the subject “Hollow Chess data deletion request”. Include the email address or display name of the account, so we can locate it. We will process your request and delete the associated data within 30 days. Use this route if you are unable to sign in, or to ask us to remove anything that remains after an automated deletion.
| Data | What happens | Retention |
|---|---|---|
| Account identity (Firebase account, email address if you registered with one, sign-in provider, user ID) | Deleted when you delete your account in the app or on the web. | Removed on deletion. |
| Server-side account data (online rating / Elo, leaderboard entries — including your Daily Challenge times and badges — friend code, display name and avatar shown to opponents) | Deleted together with the account. | Removed on deletion. |
| Match records of completed online games | Kept where needed for ratings and leaderboard integrity. If any record linked to you remains after deletion, we will remove or de-identify it on request (Option 3). | Removed or de-identified on request. |
| On-device profile & progress (display name, emoji avatar, ratings, streaks, solved puzzles, custom levels) | Deleted when you delete the profile in the app or uninstall the app. | Removed immediately; nothing is kept by us. |
| Analytics and crash data (Google Analytics for Firebase and Firebase Crashlytics: app-interaction events, device identifiers, crash and diagnostic reports, approximate location derived from IP) | Collected only if you consent. On an email request we delete the data associated with you. Otherwise it is retained for a limited period and then automatically deleted. | Up to 14 months by default in our Firebase configuration, then auto-deleted. |
| Gameplay telemetry (per-puzzle solve statistics sent with a per-install identifier, used to tune puzzle difficulty) | Collected only if you consent. Not linked to your name or email. Turning the setting off deletes anything still queued on your device. Deleted on an email request. | Removed on request. |
| Per-board records (from app version 2.1.6: one record for each puzzle played, with a random installation ID, also for a signed-in player) | Collected only if you consent. Not linked to your name, email address or account. When you turn off Share usage stats or delete your account in the app, the app deletes the records still on your device and asks our server to delete all records of your installation. A deletion on this web page has no installation ID, so it cannot find these records: they are deleted automatically after 90 days. | 90 days after the day of play, or earlier on a deletion in the app. |
| Live match content (moves and bids exchanged during a game) | Processed only while the match is running. | Not retained after the match. |
| Server connection logs (e.g. IP address, handled by our provider Cloudflare) | Short-lived operational logs used for delivery and security. | Kept only briefly, then discarded. |
Our server database keeps point-in-time backups for 30 days (Cloudflare D1 Time Travel). So deleted data can remain in these backups for up to 30 days before it is gone.
Questions about deleting your account or data:
Email: galactictoast.dev@gmail.com