Privacy Policy — ChessFury
Effective Date: April 15, 2026 · Last Updated: April 15, 2026
Alexander Klaas ("we," "our," or "us") built ChessFury as a free app. This Privacy Policy explains how we collect, use, and protect your information when you use ChessFury. By using ChessFury, you agree to the practices described below. If you do not agree, please do not use the app.
1. Information We Collect
Information We Do NOT Collect
- We do not collect personal information such as your name, email address, or phone number.
- We do not require account creation or registration.
- We do not track you across other apps or websites.
- We do not use advertising identifiers (IDFA).
- We do not access your contacts, location, camera, photos, or health data.
Information Stored Locally on Your Device
ChessFury stores the following data locally on your device using Apple's SwiftData framework:
- Player profile: display name, ELO rating, game statistics (wins, losses, draws).
- Game records: PGN notation, opponent ID, move count, accuracy.
- Opponent progress: win/loss record against each AI character.
- Achievements: unlocked achievements and progress.
This data is not transmitted to any server operated by us.
iCloud Sync (Optional, via Apple)
If you are signed in to iCloud on your device and iCloud is enabled for ChessFury (the default on iOS), the locally stored data listed above is automatically synchronized across your Apple devices using Apple's CloudKit framework, stored in your personal iCloud private database.
- This data is stored in your private iCloud container. We (the developer) cannot access, read, or modify the contents of your iCloud private database.
- Apple processes this data in accordance with the Apple Privacy Policy.
- You can disable iCloud sync for ChessFury at any time: iOS Settings → [Your Name] → iCloud → Apps Using iCloud → ChessFury.
- If you disable iCloud sync, the app continues to work with local-only storage on the current device.
Information Collected Automatically
We use third-party services to improve app stability and understand how ChessFury is used. These services collect anonymous, non-personally-identifiable data:
- Crash data: If the app crashes, we collect diagnostic data including crash logs, device model, OS version, and app state to help us fix issues.
- Performance data: Anonymous performance metrics (app launch time, screen load times).
- Usage analytics: Anonymous usage events such as which features are used, game start/end events, and screen views. This data is not linked to your identity.
- Application logs: Structured application logs for debugging purposes. These logs do not contain personal information.
2. How We Use Your Information
We use the information we collect to fix bugs and resolve crashes, monitor and improve app performance, understand aggregate usage patterns to guide product development, and ensure the app functions correctly.
We do NOT use your information to sell your data to third parties, build advertising profiles, identify you personally, send you marketing communications, or make automated decisions that significantly affect you.
3. How We Share Your Information
We do not sell, rent, or trade your personal information. We may share anonymous, aggregated data with our service providers (listed in Section 4) solely for the purposes described above. These providers only access data necessary to perform their services and are contractually required to protect it. We may disclose information if required by law, regulation, legal process, or government request.
4. Third-Party Services
| Service | Purpose | Data Collected | Privacy Policy |
|---|
| Sentry | Crash reporting & performance monitoring | Crash logs, device info, performance metrics | sentry.io/privacy |
| PostHog | Anonymous usage analytics | Usage events, screen views, app lifecycle events, device model | posthog.com/privacy |
| Axiom | Structured logging | Application logs, error categories | axiom.co/privacy |
None of these services collect personally identifiable information from ChessFury users.
5. Data Retention
- Local device data: Stored indefinitely on your device. You can delete it at any time by deleting the app.
- Crash data (Sentry): Retained for up to 90 days, then automatically deleted.
- Usage analytics (PostHog): Retained for up to 12 months in aggregated form, then deleted.
- Application logs (Axiom): Retained for up to 30 days, then automatically deleted.
6. Data Security
All network communications use encryption in transit (TLS/HTTPS). Local data is stored using Apple's SwiftData framework with device-level encryption. No sensitive personal data is collected or transmitted. No method of transmission or storage is 100% secure. We cannot guarantee absolute security, but we take commercially reasonable steps to protect your data.
7. Your Rights
Since ChessFury does not collect personal information or require accounts, most data rights are exercised directly on your device:
- Delete your data: Delete the ChessFury app to remove all local data.
- Opt out of analytics: You can limit analytics collection by enabling "Limit Ad Tracking" in your device Settings.
If you have questions about your data, contact us at admin@chessfury.app / 4klaasa@gmail.com. We will respond within 30 days.
For European Union Residents (GDPR)
- Data controller: Alexander Klaas, admin@chessfury.app / 4klaasa@gmail.com
- Lawful basis for processing: Legitimate interests (improving our service, fixing bugs, ensuring stability).
- Data subject rights: You have the right to access, rectify, erase, restrict, or object to processing of your data. Contact us at admin@chessfury.app or 4klaasa@gmail.com.
- Data transfers: Our service providers (Sentry, PostHog, Axiom) may process data outside the EEA with appropriate safeguards (Standard Contractual Clauses).
- Complaints: You have the right to lodge a complaint with your local Data Protection Authority.
For California Residents (CCPA)
- Right to know: You may request information about data we have collected. Since we do not collect personal information, there is no personal data to disclose.
- Right to delete: You may delete all local data by deleting the app.
- We do not sell personal information. We will never sell your data.
- Non-discrimination: We will not discriminate against you for exercising your rights.
8. Children's Privacy
ChessFury is not intended for children under 13. We do not knowingly collect personal information from children under 13. Since no personal information is collected from any user, no special data collection occurs for children. If you believe a child has provided us with personal information, please contact us at admin@chessfury.app or 4klaasa@gmail.com.
9. Changes to This Privacy Policy
We may update this Privacy Policy from time to time. When we make changes, we will update the "Last Updated" date at the top of this document and post the updated policy at our privacy policy URL. Your continued use of ChessFury after changes are posted constitutes acceptance of the updated Privacy Policy.
10. Contact Us