Privacy Policy

Effective Date: December 24, 2025
Last Updated: December 24, 2025

1. Introduction

Welcome to Fast BAC Calculator ("we," "our," or "us"). We are committed to protecting your privacy and ensuring transparency in how we handle information. This Privacy Policy explains what data we collect, how we use it, and your rights regarding your personal information.

2. Information We Collect

2.1 Information You Provide

Our BAC Calculator operates entirely in your browser. When you use our calculator, the information you enter (gender, weight, number of drinks, time elapsed) is:

• Not stored on our servers
• Not transmitted to us
• Not saved in any database
• Processed locally in your browser only

2.2 Automatically Collected Information

We may collect certain technical information automatically through analytics services:

• Device Information: Browser type, operating system, device type
• Usage Data: Pages visited, time spent, interactions (via Vercel Analytics)
• IP Address: Approximate location (city/country level only)
• Cookies: See Section 4 for detailed cookie information

2.3 AI Assistant Conversations

When you use our AI assistant feature, your questions may be sent to our AI service provider (Evolink Gateway / Google Gemini) for processing. These conversations are:

• Processed in real-time and not permanently stored by us
• Subject to the privacy policies of our AI service providers
• Not linked to your personal identity

3. How We Use Your Information

We use the automatically collected information for:

• Service Improvement: Understanding how users interact with our calculator
• Analytics: Monitoring traffic patterns and popular features
• Advertising: If Google AdSense is enabled, serving relevant ads (see Section 5)
• Security: Detecting and preventing fraud or abuse

4. Cookies and Tracking Technologies

4.1 Types of Cookies We Use

4.2 Managing Cookies

You can control cookies through our cookie consent banner (appears on first visit) or through your browser settings. Note that blocking essential cookies may affect site functionality.

5. Third-Party Services

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

5.1 Vercel Analytics

• Purpose: Anonymous website analytics
• Data Collected: Page views, referrers, device types (anonymized)
• Privacy Policy: https://vercel.com/legal/privacy-policy

5.2 Google AdSense (if enabled)

• Purpose: Display advertisements
• Data Collected: Cookies for ad personalization, user behavior
• Privacy Policy: https://policies.google.com/privacy
• Opt-Out: Google Ad Settings

5.3 AI Service Providers (Evolink / Google Gemini)

• Purpose: AI-powered explanations and calculations
• Data Collected: Your questions and conversation context
• Data is processed in real-time and not stored permanently by us

6. Data Retention

• Calculator Inputs: Never stored (processed client-side only)
• Analytics Data: Retained for up to 90 days (Vercel Analytics policy)
• Cookies: As specified in Section 4.1
• AI Conversations: Not permanently stored by us

7. Your Privacy Rights

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

7.1 GDPR Rights (EU/EEA Users)

• Access: Request a copy of data we hold about you
• Rectification: Correct inaccurate data
• Erasure: Request deletion of your data ("Right to be Forgotten")
• Restriction: Limit how we process your data
• Portability: Receive your data in a machine-readable format
• Objection: Opt out of certain data processing activities

7.2 CCPA Rights (California Users)

• Know: What personal information is collected and how it's used
• Delete: Request deletion of personal information
• Opt-Out: Opt out of the sale of personal information (we do not sell data)
• Non-Discrimination: Equal service regardless of privacy choices

7.3 Exercising Your Rights

To exercise any of these rights, please contact us at: privacy@fastbaccalculator.com

8. Children's Privacy

Our services are not directed to individuals under 18 years of age. We do not knowingly collect personal information from children. If you believe we have inadvertently collected data from a minor, please contact us immediately.

9. Data Security

We implement industry-standard security measures including:

• HTTPS encryption for all data transmission
• Secure hosting on Vercel's infrastructure
• Client-side processing for sensitive calculator inputs
• Regular security audits and updates

However, no method of transmission over the internet is 100% secure. While we strive to protect your information, we cannot guarantee absolute security.

10. International Data Transfers

Our services are hosted on Vercel (USA). If you access our site from outside the United States, your data may be transferred to, stored, and processed in the USA. By using our services, you consent to this transfer.

11. Changes to This Privacy Policy

We may update this Privacy Policy periodically. Changes will be posted on this page with an updated "Last Updated" date. For material changes, we may provide additional notice (e.g., a banner on our homepage).

12. Contact Us

If you have questions or concerns about this Privacy Policy, please contact us:

• Email: privacy@fastbaccalculator.com
• Website: https://fastbaccalculator.com

13. Important Disclaimers