Effective date: 2 August 2026

Your privacy matters to us. This Privacy Policy sets out the types of information collected, used and safeguarded by Grid Zen ("the App") when used on mobile iOS or Android devices.

1. Information We Collect Automatically

Grid Zen is a free-to-use spatial logic puzzle supported by third-party advertising and optional in-app purchases. To provide these services, we use standard industry software development kits (SDKs) which may collect certain device-level information:

• Device identifiers: mobile advertising identifiers (such as Apple's IDFA or Android's Advertising ID) used to deliver relevant advertising.
• Technical data: your device model, operating system version, system language, and IP address (used to infer your approximate region for the correct currency display).
• App data: your level progress, hint balance, high scores and unlocked colour palettes is stored solely and persistently on your own device using local storage — it is never uploaded to us or to any server.

2. Third-Party Services We Use

The App integrates the following third-party services, each with its own independent privacy policy:

• Google AdMob — We use the Google Mobile Ads SDK to display banner and interstitial adverts. AdMob uses anonymised identifiers to serve, personalise and measure advertising performance. You can read Google's policy here: Google Privacy Policy.
• App Store Billing — In-app purchases ("Remove Ads", hint packs, and "Infinite Hints") are handled securely through Apple's App Store and Google Play Billing. We never collect, process or store your card details or payment credentials.

3. How We Use Collected Data

Any device data gathered automatically is used solely to:

• Serve relevant banner and interstitial advertising.
• Detect your regional locale, to display prices in the correct local currency (e.g. £, $, €, ¥).
• Understand aggregate usage so we can improve the App's balance, features and design.

4. Your Rights & Choices (Opt-Out)

You can restrict advertising tracking, or opt out of personalised ads entirely, from your device settings:

• On iOS: go to Settings > Privacy & Security > Tracking and disable "Allow Apps to Request to Track".
• On Android: go to Settings > Privacy > Ads and select "Opt out of Ads Personalisation", or reset your Advertising ID.