Privacy Policy

1. Introduction

Calc618 ("we", "us", "our") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, store, and protect your information when you use our free trading calculator service.

TL;DR: We collect minimal data, use secure authentication, never sell your information, and you can delete your account anytime.

2. Information We Collect

2.1 Information You Provide

When you use Calc618, you may provide:

• Account Information: Email address (if you create an account for trade journal features)
• Calculator Inputs: Trade parameters (asset, price, quantity, leverage, etc.)
• Trade Journal Data: Saved trade setups, notes, tags (if you use the journal feature)
• User Preferences: Custom settings like default fees, TP/SL levels (stored in browser)

2.2 Information We Collect Automatically

• Usage Data: Pages visited, features used, time spent
• Device Information: Browser type, operating system, screen resolution
• Log Data: IP address, access times, errors
• Cookies: See our Cookie Policy for details

2.3 Third-Party Data

We use third-party APIs to fetch:

• Cryptocurrency Prices: CoinGecko API (real-time market data)
• Stock Prices: Financial data APIs for US equities

We do not share your personal information with these services - we only request public market data.

3. How We Use Your Information

We use your information to:

• Provide the Service: Calculate positions, fees, risk/reward, liquidation prices
• Save Your Data: Store trade journal entries and preferences (if you have an account)
• Improve the Service: Analyze usage patterns to enhance features
• Communicate: Send important updates or respond to your inquiries
• Security: Detect and prevent fraud, abuse, or technical issues

We DO NOT:

• Sell your data to third parties
• Use your trade data for our own trading
• Share your information with advertisers
• Train AI models on your data (we removed all AI features)

4. Data Storage & Security

4.1 Where We Store Data

• Browser Storage: User preferences and temporary calculator data are stored locally in your browser (localStorage)
• Secure Database: Account and trade journal data are stored encrypted in Supabase (secure cloud database)
• Authentication: We use Supabase Auth for secure, encrypted authentication

4.2 How We Protect Data

• HTTPS encryption for all data transmission
• End-to-end encryption: Your trade journal data is encrypted at rest in the database
• Secure password hashing (never stored in plain text)
• Row-level security policies on database - you can only access your own data
• Regular security audits and updates
• No payment data stored (donations through third-party NOWPayments)

Note: While we implement industry-standard security measures, no system is 100% secure. Use strong passwords and enable two-factor authentication if available.

5. Data Sharing & Disclosure

5.1 We Do Not Sell Your Data

We never sell, rent, or trade your personal information.

5.2 Service Providers

We share minimal data with trusted service providers who help us operate:

• Supabase: Database and authentication (subject to their privacy policy)
• Vercel/Hosting: Website hosting and deployment
• NOWPayments: Crypto donation processing (only if you donate)

5.3 Legal Requirements

We may disclose information if required by law, court order, or to:

• Comply with legal obligations
• Protect our rights or property
• Prevent fraud or abuse
• Protect user safety

6. Your Data Rights

You have the right to:

• Access: Request a copy of your data
• Correction: Update or correct your information
• Deletion: Delete your account and all associated data
• Export: Download your trade journal data
• Opt-Out: Unsubscribe from emails (if we send any)

To exercise these rights, contact us at info@calc618.com.

7. Data Retention

• Account Data: Stored until you delete your account
• Trade Journal: Stored until you delete individual entries or your account
• Browser Storage: Stored locally until you clear browser data
• Logs: Retained for 90 days for security and debugging

8. Children's Privacy

Calc618 is not intended for users under 18 years of age. We do not knowingly collect information from children. If you believe a child has provided us with data, contact us immediately at info@calc618.com.

9. International Users

Our servers are located in the United States and Europe (via Supabase). By using Calc618, you consent to the transfer and processing of your data in these jurisdictions.

If you are in the EU/EEA, you have additional rights under GDPR. Contact us for more information.

10. No AI Training

We do not use your data to train AI models. We deliberately removed all AI features from Calc618 to focus on transparent, mathematical calculations. Your trade setups and journal entries are for your personal use only.

11. Changes to Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes by:

• Updating the "Last Updated" date
• Displaying a notice on the website
• Sending an email (if you have an account)

Continued use after changes constitutes acceptance of the updated policy.

12. Contact Us

For privacy questions, data requests, or concerns, contact us at:

Email: info@calc618.com