Privacy Policy
Sudoku Tutor
Last Updated: December 2025
Effective Date: December 2025
Plain Language Summary
What we collect:
- Basic app usage data (which screens you visit, how long you play)
- Crash reports if the app crashes (to fix bugs)
- Advertising ID for showing relevant ads
What we DON'T collect:
- Your name, email, or personal contact information
- Your location
- Your photos, files, or contacts
- Your puzzle solutions or game strategies
Who we share data with:
- Google (for ads, analytics, and crash reporting)
- No one else
Your rights:
- You can reset your advertising ID anytime in device settings
- You can opt out of personalized ads
- You can request data deletion by contacting us
Full Privacy Policy
1. Introduction
Welcome to Sudoku Tutor ("we," "our," or "us"). We respect your privacy and are committed to protecting your personal data. This privacy policy explains how we collect, use, and safeguard your information when you use our mobile application.
This policy complies with:
- General Data Protection Regulation (GDPR) - European Union
- California Consumer Privacy Act (CCPA) - California, USA
- Children's Online Privacy Protection Act (COPPA) - USA
- Google Play Developer Program Policies
Analytics Data (via Firebase Analytics)
- App opens and session duration
- Screen views and navigation patterns
- Feature usage (e.g., hint usage, techniques learned)
- Device type, operating system version
- Country/region (not precise location)
- App version and crash-free statistics
Crash Reports (via Firebase Crashlytics)
- Stack traces and error logs
- Device state at time of crash
- Device model and OS version
- App version
Advertising Data (via Google AdMob)
- Advertising ID (can be reset in device settings)
- Ad interaction data (views, clicks)
- General location (country-level for ad relevance)
Google Play Games (Optional)
- If you choose to sign in with Google Play Games:
- Player ID (anonymized identifier)
- Display name (for leaderboards)
- Achievement and leaderboard data
Note: We do NOT collect:
- Name, email address, or phone number
- Precise location or GPS data
- Contacts, photos, or files
- Payment information (handled by Google Play)
| Data Type |
Purpose |
Legal Basis (GDPR) |
| Analytics |
Improve app features and user experience |
Legitimate interest |
| Crash reports |
Fix bugs and improve stability |
Legitimate interest |
| Advertising ID |
Show relevant ads, measure ad performance |
Consent |
| Play Games data |
Enable leaderboards and achievements |
Contract (your request) |
4. Third-Party Services
We use the following third-party services:
Google AdMob
Firebase Analytics
Firebase Crashlytics
Google Play Games Services
5. Data Retention
| Data Type |
Retention Period |
| Analytics data |
14 months |
| Crash reports |
90 days |
| Ad interaction data |
Per Google's policy |
| Play Games data |
Until you disconnect or delete |
6. Data Sharing
We do NOT sell your personal data.
We share data only with:
- Google: For analytics, crash reporting, and advertising services
- Legal requirements: If required by law or to protect our rights
7. Your Rights
For All Users:
- Access: Request what data we have about you
- Deletion: Request deletion of your data
- Opt-out: Disable personalized ads in device settings
Additional Rights for EU/EEA Residents (GDPR):
- Rectification: Correct inaccurate data
- Restriction: Limit how we process your data
- Portability: Receive your data in a portable format
- Object: Object to processing based on legitimate interest
- Withdraw consent: For consent-based processing
Additional Rights for California Residents (CCPA):
- Know: What personal information we collect
- Delete: Request deletion of personal information
- Opt-out: Of sale of personal information (we don't sell data)
- Non-discrimination: Equal service regardless of privacy choices
8. How to Exercise Your Rights
Reset Advertising ID:
- Android: Settings > Google > Ads > Reset advertising ID
Opt Out of Personalized Ads:
- Android: Settings > Google > Ads > Opt out of Ads Personalization
Delete Play Games Data:
Contact Us:
- Email: codepoetry.jc@gmail.com
- Subject: "Privacy Request - Sudoku Tutor"
- Include: Your request type and any relevant details
We will respond within:
- 30 days for GDPR requests
- 45 days for CCPA requests
9. Children's Privacy
Sudoku Tutor is rated for ages 7+ (PEGI) / E10+ (ESRB).
COPPA Compliance:
- We do not knowingly collect personal information from children under 13
- We use Google's child-directed ad settings where applicable
- If you believe we have collected data from a child under 13, contact us immediately
For Parents:
- Review your child's device privacy settings
- Consider using Family Link for additional controls
- Contact us with any concerns about your child's data
10. Data Security
We implement appropriate security measures:
- All data transmitted using HTTPS/TLS encryption
- Third-party services (Google) maintain enterprise-grade security
- No sensitive personal data stored on our servers
- Regular security reviews of our implementation
11. International Data Transfers
Your data may be processed in:
- United States (Google servers)
- European Union (Google servers)
For EU residents, transfers are protected by:
- Google's Standard Contractual Clauses
- Google's certification under EU-US Data Privacy Framework
12. Changes to This Policy
We may update this policy periodically. Changes will be:
- Posted in this document with updated "Last Updated" date
- Notified in-app for significant changes
- Effective immediately unless otherwise stated
Developer: Caldwell Software
Email: codepoetry.jc@gmail.com
Address: 89 Caper Ln, Valparaiso, IN 46383
For privacy-specific inquiries, use subject line: "Privacy Inquiry - Sudoku Tutor"