Nail Technologies Limited

Privacy policy

Block Stack

This policy explains what data is stored locally, what third-party services may collect, and how to contact us.

Last updated: April 27, 2026

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Overview

Block Stack is a casual block-stacking mobile game developed by Nail Technologies Limited ("we", "our", or "us"). We respect your privacy and are committed to protecting it.

Locally Stored Data

The following data is stored only on your device using local storage and is never transmitted to our servers:

  • High scores and game statistics
  • Game settings and preferences
  • Achievement progress
  • Player display name (optional, for sharing)
  • Power-up inventory

Analytics

We use analytics services, for example Firebase Analytics, to collect anonymized usage data such as app opens, screen views, game events, crash reports, and error logs.

This data is used to understand app performance, improve gameplay, detect issues, and make the game better over time.

Advertising

Block Stack uses Google AdMob to display advertisements. AdMob may collect device identifiers, IP address for approximate location-based ad targeting, and app usage data for ad personalization.

You can opt out of personalized advertising through your device settings or when prompted by the consent dialog.

Children's Privacy

Block Stack is suitable for general audiences. We do not knowingly collect personal information from children under 13. If you believe a child has provided personal information, please contact us and we will take appropriate action.

In-App Purchases

Block Stack offers optional in-app purchases, for example "Remove Ads". Purchases are handled securely by the Apple App Store or Google Play Store. We do not collect or store your payment card details.

Your Rights

  • You can reset all local data by reinstalling the app.
  • You can opt out of ad personalization via your device's privacy settings.
  • On iOS, you will be prompted to allow or deny app tracking (ATT).
  • You can contact us to ask questions about this policy or how your data is handled.

Changes to This Policy

We may update this policy from time to time. Changes will be reflected in the "Last updated" date above.

Contact

If you have questions about this privacy policy, please contact Nail Technologies Limited:

Email: nailtechnologieslimited@gmail.com

This privacy policy applies to Block Stack on Android and iOS unless a platform-specific policy is published on this site.