Privacy Policy

Last updated: September 24, 2026

1. Introduction

Kuarst ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our QR code security analysis service.

2. Information We Collect

2.1 Information You Provide

  • Account Information: Email address, name, password (hashed)
  • Payment Information: Processed securely through third-party payment processors (Paddle, RevenueCat)
  • QR Code Data: URLs and content from QR codes you scan (stored only for authenticated users)

2.2 Automatically Collected Information

  • Device Information: Device ID, browser type, operating system
  • Usage Data: Scan history, feature usage, timestamps
  • Technical Data: IP address, request headers, error logs

3. How We Use Your Information

We use the collected information for:

  • Providing and maintaining the Service
  • Processing your transactions and managing subscriptions
  • Improving and personalizing your experience
  • Analyzing usage patterns and service performance
  • Communicating with you about service updates and support
  • Detecting and preventing fraud or abuse
  • Complying with legal obligations

4. Data Sharing and Disclosure

We do not sell your personal information. We may share your information only in the following circumstances:

  • Service Providers: With trusted third-party services (payment processors, hosting providers, analytics)
  • Threat Intelligence: URLs may be checked against external threat intelligence services (Google Safe Browsing, VirusTotal)
  • Legal Requirements: When required by law or to protect our rights
  • Business Transfers: In connection with a merger, acquisition, or sale of assets

5. Data Security

We implement appropriate technical and organizational measures to protect your personal information, including:

  • Encryption of data in transit (HTTPS/TLS)
  • Hashed password storage
  • Secure database access controls
  • Regular security audits and updates

However, no method of transmission over the Internet is 100% secure, and we cannot guarantee absolute security.

6. Data Retention

We retain your information for as long as necessary to provide the Service and fulfill the purposes outlined in this policy:

  • Account Data: Until you delete your account
  • Scan History: 7 days for free users, unlimited for premium users
  • Payment Records: As required by law (typically 7 years)
  • Logs: Up to 90 days for security and debugging purposes

7. Your Rights

Depending on your location, you may have the following rights:

  • Access: Request a copy of your personal data
  • Correction: Update or correct inaccurate information
  • Deletion: Request deletion of your account and data
  • Portability: Export your data in a machine-readable format
  • Objection: Object to certain processing activities

To exercise these rights, please contact us through our support channels.

8. Cookies and Tracking

We use cookies and similar technologies to:

  • Maintain your session and authentication
  • Remember your preferences
  • Analyze service usage

You can control cookies through your browser settings. However, disabling cookies may limit some Service functionality.

9. Children's Privacy

The Service is not intended for users under the age of 13. We do not knowingly collect personal information from children under 13. If you believe we have collected information from a child under 13, please contact us immediately.

10. International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. These countries may have different data protection laws. By using the Service, you consent to such transfers.

11. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any material changes by posting the new policy on this page and updating the "Last updated" date. Your continued use of the Service after such changes constitutes acceptance of the new policy.

12. Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us through our support channels.