Effective Date: February 23, 2026
Last Updated: February 23, 2026
1. Introduction
Welcome to LinguaDuel! This Privacy Policy explains how CuriousCrafts ("we," "us," or "our") collects, uses, shares, and protects your personal information when you use the LinguaDuel mobile application (the "App").
By using LinguaDuel, you agree to the collection and use of information in accordance with this policy. If you do not agree with our practices, please do not use the App.
2. Information We Collect
2.1 Information You Provide
Account Information:
- Email address
- Username
- Password (encrypted and hashed)
- Display name
- Profile customization choices (badges, cosmetics)
Language Preferences:
- Selected language tracks (source and target languages)
- Active language pair
User-Generated Content:
- Translation submissions
- Challenge responses
- In-game messages or communications
2.2 Automatically Collected Information
Gameplay Data:
- Challenge attempts and results
- Translation accuracy and scores
- Rank points and league standings
- Duel match history and outcomes
- Power-up usage
- Energy consumption patterns
- Daily login streaks
- Session timestamps and duration
Device Information:
- Device type and model
- Operating system version
- Unique device identifiers
- App version
Usage Analytics:
- Features accessed
- Navigation patterns within the App
- Crash reports and error logs
- Performance metrics
2.3 Transaction Information
In-App Purchases:
- Purchase history
- Transaction IDs
- Payment processor information (handled by Apple/Google)
- Subscription status (free or premium)
- Coin balance and transactions
Note: We do not directly collect or store credit card information. All payment processing is handled securely by Apple App Store or Google Play Store.
3. How We Use Your Information
We use the collected information for the following purposes:
3.1 Core Functionality
- Create and manage user accounts
- Provide language learning challenges and duels
- Process translations and provide AI-powered feedback
- Calculate scores, rankings, and league standings
- Manage energy system and in-game economy
- Process in-app purchases and subscriptions
- Deliver daily rewards and track streaks
3.2 Matchmaking and Competition
- Match players for real-time duels
- Organize league groups with similarly skilled players
- Generate global and session-specific leaderboards
- Track win/loss records and statistics
3.3 Service Improvement
- Analyze usage patterns to improve features
- Identify and fix bugs or technical issues
- Develop new content and features
- Optimize app performance
- Personalize user experience
3.4 Communication
- Send important service notifications
- Notify users about match updates, duel invitations, or league changes
- Respond to user inquiries and support requests
- Send promotional communications (with consent)
3.5 Security and Fraud Prevention
- Detect and prevent cheating or unauthorized access
- Verify user identities
- Protect against fraudulent transactions
- Enforce our Terms of Service
4. AI-Powered Features
LinguaDuel uses artificial intelligence (OpenAI's GPT models) to:
- Generate language learning challenges
- Evaluate translation accuracy
- Provide grammar feedback and corrections
- Suggest vocabulary improvements
Data Sent to AI Provider:
- Challenge prompts
- User translation submissions
- Language pair information
AI Processing:
- Your translations are sent to OpenAI's API for evaluation
- OpenAI processes data according to their own privacy policy
- We do not share personally identifiable information with AI providers
- Translation data is used solely for evaluation purposes
For more information, review OpenAI's privacy policy at: https://openai.com/privacy
5. How We Share Your Information
We do NOT sell your personal information. We may share information in the following circumstances:
5.1 Public Information
- Leaderboards: Your username, score, and ranking are visible to other players
- Duel Matches: Your username and performance stats are visible to opponents
- League Standings: Your position and rank points are visible to league members
5.2 Service Providers
We may share information with third-party service providers who assist us:
- Cloud Hosting: MongoDB Atlas for database services
- AI Services: OpenAI for challenge generation and evaluation
- Analytics: For app performance and usage analysis
- Payment Processors: Apple and Google for in-app purchases
All service providers are contractually obligated to protect your data.
5.3 Legal Requirements
We may disclose information if required by law or in response to:
- Valid legal processes (subpoenas, court orders)
- Requests from law enforcement or government authorities
- Protecting our rights, property, or safety
- Preventing fraud or security threats
5.4 Business Transfers
If CuriousCrafts is involved in a merger, acquisition, or asset sale, your information may be transferred. We will notify you before your data becomes subject to a different privacy policy.
6. Data Retention
We retain your information for as long as your account is active or as needed to provide services.
Account Data: Retained until you delete your account
Gameplay History: Retained for statistical and ranking purposes
Transaction Records: Retained for legal and accounting requirements (typically 7 years)
Deleted Accounts: Anonymous gameplay data may be retained for analytics
You can request account deletion at any time (see Section 9).
7. Data Security
We implement industry-standard security measures to protect your information:
Technical Safeguards:
- Encrypted data transmission (HTTPS/TLS)
- Password hashing with bcrypt
- Secure JWT-based authentication
- Regular security audits and updates
Operational Safeguards:
- Access controls and authorization
- Monitoring for suspicious activity
- Regular backups
- Incident response procedures
However, no method of transmission or storage is 100% secure. While we strive to protect your data, we cannot guarantee absolute security.
8. Children's Privacy
LinguaDuel is intended for users aged 13 and older. We do not knowingly collect personal information from children under 13.
If you are a parent or guardian and believe your child under 13 has provided us with personal information, please contact us at privacy@curiouscrafts.com. We will promptly delete such information.