This policy explains how the mobile game Stack (the “App”), published by Grootcore (“we”, “us”), handles information. Stack is a single-player puzzle game with no accounts, no login, and no servers of our own.
None. We do not ask for, collect, or transmit your name, email address, phone number, contacts, photos, precise location, or any other personally identifying information. The App has no sign-up, no user profiles, and no analytics of our own.
The App saves your game progress locally on your device using your platform's standard app-storage mechanism. This data never leaves your device and is not visible to us. It consists of:
Uninstalling the App permanently deletes all of this. You can also clear it at any time via your device settings (Android: Settings → Apps → Stack → Storage → Clear data).
The App displays advertisements through Google AdMob, provided by Google LLC. To serve, measure, and protect those ads, the Google Mobile Ads SDK and its ad partners may collect and process information from your device, including:
| Data | Used for |
|---|---|
| Advertising ID (a resettable device identifier) | Serving and measuring ads; limiting repeat ads; fraud prevention |
| Device information (model, OS version, language, screen size) | Formatting and delivering ads |
| IP address and coarse location derived from it | Region-appropriate ads and legal compliance |
| Ad interaction data (impressions, clicks, rewarded-ad completions) | Measurement, billing, and invalid-traffic detection |
We do not receive or store this data ourselves — it is collected directly by Google and its partners under their own policies. For details, see Google's Privacy Policy, How Google uses information from partner apps, and Google's list of ad technology providers.
Stack is not directed to children under 13 and we do not knowingly collect information from them. If you believe a child has provided information through our advertising partners, please contact us and we will assist in directing the request to the appropriate provider.
Depending on where you live, you may have rights under the GDPR, UK GDPR, CCPA/CPRA, or similar laws — including access to, correction of, or deletion of personal data, and the right to opt out of the “sale” or “sharing” of personal information.
Because we hold no personal data about you on any server, the fastest route for advertising data is Google, which acts as the controller for the information described in section 3. Use the controls in section 4, or contact us and we will help you direct your request. Note that under some privacy laws, the use of advertising identifiers for personalised advertising may be considered a “sale” or “sharing” of personal information; you may opt out using the controls above.
We retain no data, because we collect none. Game progress persists on your device until you delete it. Advertising data is retained by Google in accordance with its own retention policies.
Network traffic between the App and Google's advertising services is encrypted in transit using HTTPS. As we operate no servers and store no user data, there is no account or database of ours that could be breached.
We may update this policy as the App evolves or as legal requirements change. The “Last updated” date at the top will always reflect the current version. Material changes will be reflected here before they take effect.
Questions about this policy or your data:
Grootcore
Email: hammas.ahmmed@grootcore.com