Sudoku Flip Privacy Policy

Last updated: June 2026

What We Collect

Anonymous User ID: When you first open Sudoku Flip, we create an anonymous identifier using Firebase Authentication. This ID is not linked to any personal information.

Game Data: Your puzzle progress, completion times, and leaderboard scores are stored locally and synced to our servers for leaderboard features.

Analytics: We use Firebase Analytics to understand how the app is used (screens viewed, features used, crash reports). This data is aggregated and anonymous.

What We Don't Collect

• No email, name, or personal details
• No location data
• No contacts or phone data
• No photos or files
• No advertising identifiers (unless you watch an optional ad)

Optional Features

Leaderboards: If you submit scores to leaderboards, your anonymous ID and chosen display name are visible to other players.

Support Pack: If you purchase the Support Pack, the transaction is handled by Apple/Google. We don't receive your payment details.

Hints via Ads: Free users can watch ads for hints. AdMob may collect device identifiers for ad personalization. You can opt out in device settings.

Data Storage

• Local data: Stored on your device
• Leaderboard data: Stored in Firebase Firestore (Google Cloud)
• Analytics: Processed by Firebase Analytics

Your Rights

• Delete your data: Settings → Account → Delete Account
• Opt out of analytics: Use your device's app tracking settings
• Opt out of personalized ads: Use your device's ad settings

Children's Privacy

Sudoku Flip is not directed at children under 13. We do not knowingly collect personal information from children.

Changes to This Policy

We may update this policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the "Last updated" date.