Privacy Policy

Effective Date: October 25, 2025  ·  Last Updated: October 25, 2025

CircuiTry3D, founded and operated by Mitchell Lorin McKnight (“we,” “our,” or “the app”), is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our mobile application.

Information We Collect

Personal Information

We collect the following personal information:

• User Email Address — Collected during account registration. Used for account authentication and communication, and required for password recovery and important updates.
• Purchase History — In-app purchases and subscription information, transaction IDs, and purchase dates. Used for subscription management and customer support.
• App Usage Data — Circuit designs and saved projects, feature usage statistics, and app performance metrics. Used to improve app functionality and user experience.
• Authentication Tokens — Session tokens for maintaining login state and OAuth tokens if using third-party login. Stored securely and used only for authentication.

Non-Account Usage

The Free Sandbox mode does not require an account. In this mode, all circuit designs are saved locally on your device and no personal information is transmitted to our servers.

How We Use Your Information

• Account Management: Creating and managing user accounts
• Subscription Services: Processing and managing in-app purchases and subscriptions
• App Functionality: Saving your circuit designs and preferences
• Customer Support: Responding to inquiries and providing assistance
• App Improvement: Analyzing usage patterns to enhance features and performance
• Security: Protecting against unauthorized access and fraud

Data Storage and Security

• All personal data is encrypted in transit and at rest
• Authentication tokens are stored securely using industry-standard practices
• We implement appropriate technical and organizational measures to protect your data
• We do not sell or share your personal information with third parties for marketing purposes

Third-Party Services

We may use third-party services for:

• Payment processing (Google Play Billing)
• Analytics (anonymized usage data)
• Cloud storage for user-generated content (Upstash Redis — used for Classroom Mode sync when enabled)

These services have their own privacy policies and we encourage you to review them.

Your Rights

You have the right to:

• Access your personal data
• Request correction of inaccurate data
• Request deletion of your account and associated data
• Opt-out of non-essential data collection
• Export your circuit designs and data

To exercise these rights, contact us at: privacy@circuitry3d.app

Children’s Privacy

CircuiTry3D is designed for educational purposes and is appropriate for users of all ages. We do not knowingly collect personal information from children under 13 without verifiable parental consent. If you believe we have collected such information, please contact us immediately at privacy@circuitry3d.app.

Data Retention

We retain your data for as long as your account is active or as needed to provide services. You may request deletion of your account and all associated data at any time by visiting /delete-account in the app or by contacting us directly.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any significant changes through the app or via email. Continued use of the app after changes take effect constitutes acceptance of the revised policy.

Contact Us

If you have questions about this Privacy Policy, please contact the founder and data controller:

Mitchell Lorin McKnight
Email: privacy@circuitry3d.app
Website: https://circuitry3d.app/privacy

Compliance

This app complies with:

• Google Play Developer Program Policies
• General Data Protection Regulation (GDPR)
• California Consumer Privacy Act (CCPA)
• Children’s Online Privacy Protection Act (COPPA)