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Last Updated: 16 November 2025
Welcome to Sairina Science ("we," "our," or "us"). We are committed to protecting your privacy and being transparent about how we handle your information.
This Privacy Policy explains:
By using the Sairina Science app, you agree to this Privacy Policy.
If you have any questions, please contact us at: [YOUR-EMAIL@example.com]
We're privacy-focused by design:
✅ No user accounts - No registration, login, or passwords
✅ No personal information - We don't ask for names, emails, or addresses
✅ Local storage only - Your study progress stays on YOUR device
✅ No tracking - No cookies, analytics, or advertising
✅ You control your data - Export, import, or delete anytime
This is one of the most privacy-friendly study apps you'll find!
Study Progress (Stored Locally on Your Device)
When you study with flashcards or answer multiple-choice questions, we store:
Where This Data Is Stored:
You can:
Error Logs (via Sentry)
When the app crashes or has errors, we collect:
Why: To fix bugs and improve the app
Where stored: Sentry servers (EU region) - GDPR compliant
Retention: 30 days, then automatically deleted
Privacy: https://sentry.io/privacy/
Server Access Logs (via Railway)
Standard web server logs that include:
Why: Security and performance monitoring
Where stored: Railway servers
Retention: 30 days, then automatically deleted
Privacy: https://railway.app/legal/privacy
We do NOT collect:
- Purpose: Track your learning and show your progress
- Storage: Your browser's localStorage only
- Usage: Displayed in the app to help you study efficiently
- Sharing: Never shared with anyone
- Purpose: Fix bugs and improve app stability
- Storage: Sentry servers (EU, GDPR-compliant)
- Usage: Reviewed by developers to identify and fix issues
- Sharing: Not shared with anyone except Sentry (our error tracking provider)
- Purpose: Security, performance monitoring, preventing abuse
- Storage: Railway servers (our hosting provider)
- Usage: Monitor for attacks, analyze performance
- Sharing: Not shared with anyone except Railway
- What: Your study progress and settings
- Where: On your device only
- Security: Protected by your browser's security
- Access: Only you can access it
- Backup: You control backups via export feature
- What: Error logs and technical information
- Where: Sentry servers in the EU
- Security: Encrypted in transit and at rest
- Compliance: GDPR compliant
- Retention: 30 days
- What: Server access logs
- Where: Railway data centers
- Security: Industry-standard security practices
- Retention: 30 days
We implement security best practices:
However: Your study progress is stored in your browser, so:
You have the following rights regarding your data:
What: See what data we have about you
How: Export your study progress via the "Export Progress Data" button
Note: We don't store personal data, so there's nothing else to access
What: Permanently delete all your data
How:
What: Get your data in a portable format
How: Use the "Export Progress Data" button to download JSON file
Note: You can import this file into any device
What: Object to processing of your data
How: Stop using the app
What: Withdraw consent to data processing
How: Clear your browser data and stop using the app
What: Correct inaccurate data
How: Not applicable - you control all your data locally
For study progress: Use the built-in app features (export, clear)
For error logs: Email us at [YOUR-EMAIL@example.com]
For questions: Email us at [YOUR-EMAIL@example.com]
This app is designed for GCSE students (typically ages 14-16).
Under 13: If you're under 13, please ask a parent or guardian for permission before using this app.
13-16: You can use the app, but we recommend telling a parent/guardian.
Parents/Guardians: This app is safe for children because:
Parents/guardians can:
We do NOT:
We use the following third-party services:
- Purpose: Monitor and fix errors
- Data Shared: Error messages, browser type, device type, timestamps
- Privacy Policy: https://sentry.io/privacy/
- Location: EU servers (GDPR compliant)
- Purpose: Host the website
- Data Shared: Server access logs (IP, timestamps, pages)
- Privacy Policy: https://railway.app/legal/privacy
- Location: [Specify your Railway region]
We do NOT use:
localStorage:
- Purpose: Store your study progress locally
- Type: Browser storage (not a cookie)
- Data: Study progress, settings, backups
- Control: Clear via browser settings or app button
We do NOT use:
In the App:
1. Go to Progress page
2. Click "Clear All Progress" button
3. Confirm deletion
In Your Browser:
- Chrome: Settings → Privacy → Clear browsing data → Cookies and site data
- Firefox: Settings → Privacy → Clear Data → Cookies and Site Data
- Safari: Settings → Privacy → Manage Website Data → Remove All
- Retention: Until you clear it
- Control: You decide when to delete
- Backup: Export feature allows you to keep copies
- Retention: 30 days
- Auto-delete: Yes, automatically removed after 30 days
- Reason: Only need recent errors to fix bugs
- Retention: 30 days
- Auto-delete: Yes, automatically removed after 30 days
- Reason: Security and performance monitoring
Study Progress:
Error Logs:
Server Logs:
For EU users:
In the unlikely event of a data breach:
1. We'll investigate immediately
2. We'll notify affected users within 72 hours (GDPR requirement)
3. We'll notify relevant authorities
4. We'll explain what happened and what we're doing about it
Note: Since we don't collect personal information, the risk is extremely low.
We may update this Privacy Policy from time to time.
When we make changes:
We'll notify you if:
Check back periodically to stay informed.
Under GDPR, we process data based on:
If you're a California resident:
Right to Know: What data we collect (see Section 1)
Right to Delete: Clear your data (see Section 4)
Right to Opt-Out: We don't sell data, so nothing to opt out of
No Discrimination: We won't discriminate for exercising rights
We do NOT sell your personal information.
If you have questions about this Privacy Policy or your data:
Email: [YOUR-EMAIL@example.com]
Subject: "Privacy Question - Sairina Science"
We'll respond within:
For GDPR-related questions:
Email: [YOUR-DPO-EMAIL@example.com] (or same as above)
If you're in the EU/UK and have concerns, you can contact:
- UK: Information Commissioner's Office (ICO) - https://ico.org.uk
- EU: Your local data protection authority
What we collect:
What we DON'T collect:
Your rights:
Our promise:
This Privacy Policy is provided for informational purposes and constitutes a legally binding agreement between you and Sairina Science.
By using this app, you acknowledge that you have read, understood, and agree to be bound by this Privacy Policy.
Effective Date: 16 November 2025
Thank you for trusting Sairina Science with your study needs. Your privacy matters to us!
*This Privacy Policy complies with GDPR (EU), UK Data Protection Act 2018, COPPA (US), and CCPA (California).*
Questions? Contact us at [YOUR-EMAIL@example.com]