Privacy Policy

This Privacy Policy explains how BlockViz ("we," "us," or "our") collects, uses, and protects your personal information when you use our website and services at blockviz.xyz.

Last updated: January 2026

1. Information We Collect

1.1 Account Information

When you create an account, we collect:

• Email address
• Display name (if provided)
• Authentication data from third-party providers (Google, GitHub, etc.)

1.2 Usage Data

We automatically collect information about how you interact with our services:

• Pages visited and features used
• Device information (browser type, operating system)
• IP address and approximate location
• Referring website
• Session duration and navigation patterns

1.3 Payment Information

If you subscribe to a paid plan, payment processing is handled by Stripe. We do not store your full credit card number, expiration date, or CVV. We receive only:

• Last four digits of your card
• Card brand and expiration month/year
• Billing address (if provided)
• Subscription status and transaction history

1.4 User-Generated Content

We store data you create within BlockViz:

• Watchlists and saved asset selections
• Portfolios and holdings
• Settings and preferences

2. How We Use Your Information

We use the information we collect to:

• Provide our services: Authenticate your account, save your data, and deliver our visualization and simulation tools.
• Process payments: Manage subscriptions and billing through Stripe.
• Improve our services: Analyze usage patterns to enhance features and user experience.
• Communicate with you: Send service-related emails, respond to support requests, and (with your consent) marketing communications.
• Ensure security: Detect and prevent fraud, abuse, and unauthorized access.

3. Third-Party Services

We use the following third-party services that may process your data:

3.1 Data Providers

• CoinGecko: Provides cryptocurrency market data. We send asset identifiers to their API; no personal data is shared.

3.2 Analytics

• Google Analytics: Tracks website usage patterns. Google Privacy Policy
• Microsoft Clarity: Records session replays and heatmaps (anonymized). Microsoft Privacy Statement
• Vercel Analytics: Measures page performance and visits. Vercel Privacy Policy

3.3 Payments

• Stripe: Processes payments and manages subscriptions. Stripe Privacy Policy

3.4 Support

• Tawk.to: Provides live chat support. If you're signed in, your email may be visible to support agents. Tawk.to Privacy Policy

3.5 Affiliate Tracking

• Affonso: Tracks referrals for our rewards program using a 30-day cookie. Email addresses are shared if you signed up via a referral link. Affonso Privacy Policy

4. Data Retention

We retain your data as follows:

• Account data: Retained while your account is active and for 30 days after deletion request.
• Usage analytics: Aggregated data retained indefinitely; individual session data retained for up to 26 months.
• Payment records: Transaction history retained for 7 years for tax and legal compliance.

5. Your Rights

Depending on your jurisdiction, you may have the right to:

• Access: Request a copy of your personal data.
• Correction: Update or correct inaccurate data.
• Deletion: Request deletion of your account and personal data.
• Portability: Receive your data in a portable format.
• Opt-out: Disable analytics tracking via browser settings or our cookie preferences.

To exercise these rights, contact us at privacy@blockviz.xyz.

6. Data Security

We implement industry-standard security measures including HTTPS encryption, secure authentication, and access controls. However, no system is 100% secure, and we cannot guarantee absolute security.

7. International Transfers

Your data may be processed in countries outside your jurisdiction. We ensure appropriate safeguards are in place when transferring data internationally.

8. Children's Privacy

BlockViz is not intended for users under 18 years of age. We do not knowingly collect personal information from children.

9. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes by email or through our website. Continued use of our services after changes constitutes acceptance.

10. Contact Us

For privacy-related inquiries, contact us at: privacy@blockviz.xyz

For general support, visit our Support page.