Privacy Policy

Overview

klew ("we," "our," or "us") operates the klew.app website and the Klew iOS application. This policy explains what data we collect, how we use it, and your rights regarding that data.

Information We Collect

Account information. When you create an account, we collect your email address and, if you sign in with Apple, the name you choose to share. We use this to authenticate you and associate your data with your account.

Puzzle data. If you are a constructor, we store the puzzles you create, including grid content, clues, and metadata. If you are a solver, we store your solve progress, completion times, and ratings.

Usage data. We collect anonymous usage data such as page views, puzzle solve counts, and feature usage to improve the product. We do not use third-party analytics trackers.

Device information. The iOS app may collect basic device information (device type, OS version) for crash reporting and compatibility purposes.

How We Use Your Information

• To provide and maintain the klew service
• To authenticate your account and sync data across devices
• To display your published puzzles and public profile
• To calculate and display puzzle statistics and ratings
• To communicate service updates (we will never send marketing emails without consent)
• To improve the product based on aggregate usage patterns

Data Storage and Security

Your data is stored securely using Supabase, which provides encryption at rest and in transit. We use row-level security policies to ensure users can only access their own data. We do not sell, rent, or share your personal information with third parties.

Third-Party Services

• Supabase — Database, authentication, and file storage. See Supabase Privacy Policy.
• Vercel — Web hosting and deployment. See Vercel Privacy Policy.
• Apple Sign In — Authentication via Apple's identity service. See Apple Privacy Policy.

Your Rights

You have the right to:

• Access the personal data we hold about you
• Request correction of inaccurate data
• Request deletion of your account and associated data
• Export your puzzle data

To exercise any of these rights, contact us at privacy@klew.app.

Cookies and Local Storage

We use essential cookies for authentication sessions. The web solver stores your puzzle progress in your browser's local storage so you can resume solving later. We do not use advertising cookies or tracking pixels.

Children's Privacy

klew is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal data, please contact us and we will delete it.

Changes to This Policy

We may update this privacy policy from time to time. We will notify registered users of significant changes via email. The "last updated" date at the top of this page reflects when the policy was last revised.

Contact

If you have questions about this privacy policy, contact us at privacy@klew.app.