Effective date: 23 August 2026

Welcome to CrossMath Puzzle ("the App"). Your privacy matters to us. This policy explains what information the App collects, how we use it, and the choices you have. We keep data collection minimal and, wherever possible, local to your device.

1. Information We Collect

CrossMath Puzzle collects minimal data to run and improve the App:

• On-device game data — gameplay progress, puzzle completion statistics, streaks, stars, best time, and app preferences (sound effects, haptics, theme, language, text size). This is stored locally on your device.
• Voluntary feedback — if you contact us by email (e.g. through the in-app feedback option), we receive the email address and the message you send, and we use it only to respond to you.

We do not collect or require personal identification such as your name, email, phone number, or precise location to operate the App.

2. How We Use Your Information

The data described above is used to:

• Save and restore your game progress.
• Show statistics and achievements.
• Improve app performance, stability, and user experience.
• Display relevant content (see third-party services below).

3. Data Storage

• Most game data is stored locally on your device and never leaves it.
• We use Firebase (Google) for app analytics and crash reporting to help us detect and fix issues and understand aggregate usage. Firebase may process standard, non-identifying device/usage data according to Google's own privacy policy.

4. Third-Party Services

The App uses the following third-party services, which operate under their own privacy policies:

• Google AdMob — displays advertisements. AdMob may collect anonymous advertising/device identifiers and usage data to serve and measure ads.
• Google Firebase (Analytics / Crashlytics) — anonymous usage and crash analytics.