PRIVACY & TERMS
PRIVACY POLICY
Last updated: February 2026
This Privacy Policy applies to the mobile game STACK, developed by stackblockgamehelp@gmail.com.
What data we collect
We collect only the minimum necessary data:
  • Nickname — chosen by you at registration or automatically generated for guests.
  • Best score — your game record.
  • Google account ID — only when signing in with Google; used exclusively for authentication.
We do not collect email addresses, location, payment data, or any other personal information.
How we use data
Data is used only for:
  • authentication and player identification;
  • displaying nickname and score on the leaderboard.
We do not sell or share data with third parties for marketing purposes.
Data storage
Data is stored in Firebase Firestore and Firebase Authentication — cloud services by Google LLC. You can review Google's privacy policy at firebase.google.com/support/privacy.
How to delete your account
You may request deletion of your account and all associated data at any time. To do so:
  • Send an email to stackblockgamehelp@gmail.com
  • Use the subject line: Account Deletion Request
  • Include your in-game nickname in the message
  • We will confirm receipt within 2 business days and delete your data within 7 business days
What data is deleted and retained
Upon deletion request, the following data is permanently deleted:
  • Your nickname
  • Your best score
  • Your Firebase Authentication account (including linked Google account ID)
We do not retain any personal data after deletion. Deletion is completed within 7 business days of your request. Anonymous analytics data (if any) does not contain personal identifiers and may be retained by Google services per their own policies.
Advertising
The game displays ads provided by Google AdMob (Google LLC). Ads may appear after gameplay.
  • AdMob may use advertising identifiers and technical information about your device to show relevant ads.
  • We do not pass your personal data (nickname, score, account ID) to advertisers.
  • You can review Google's advertising privacy policy at policies.google.com/privacy.
Age
This game is intended for users 3 years of age and older.
TERMS OF SERVICE
Acceptance
By using this game, you confirm that you have read, understood, and agree to these terms. If you do not agree, please do not use the game.
Fair Play
The use of bots, autoclickers, scripts, and any other means of gaining an unfair advantage is prohibited. We reserve the right to delete accounts that violate this rule without notice.
Nicknames
Nicknames must not contain offensive, threatening, discriminatory, or obscene words. Violators may be blocked without warning.
Limitation of Liability
The game is provided "as is". We do not guarantee uninterrupted service and are not responsible for possible outages or loss of progress.
Changes
We may update the privacy policy and terms of service at any time. The current version is always available at this page.