Privacy Policy

Your privacy is important to us. This policy explains how we collect, use, and protect your information.

Last updated: June 28, 2025

Quick Summary

  • • We collect minimal, anonymous analytics data to improve our website and app
  • • No personal information is required to use our free calculators
  • • We use PostHog for privacy-focused analytics
  • • We explicitly do not collect personal identifiers, calculation values, or device IDs
  • • Anonymous analytics are automatically collected to improve app performance
  • • We never sell your data to third parties

Data Collection and Analytics

What Information We Collect

CineMath collects limited, anonymous usage data to improve the app experience. We collect:

Usage Analytics (Anonymous)

  • • Calculator Usage Patterns: Which calculators you use and how often
  • • Feature Interactions: How you discover and use app features
  • • Session Information: Time spent in the app and general usage patterns
  • • Performance Data: App performance metrics and error reports
  • • Crash Data: Technical crash reports and stack traces for debugging
  • • Device Information: Device type (iPhone/iPad/Mac), screen size, OS version, app version, and locale

What We DO NOT Collect

We explicitly do not collect:

  • ❌ Personal information (name, email, phone number)
  • ❌ Your calculation values or results
  • ❌ Device identifiers (IDFA, device serial numbers)
  • ❌ Location data (GPS coordinates, addresses, city, state, country)
  • ❌ Contact information or personal content
  • ❌ Cross-app tracking data

How We Collect Information

We use PostHog, a privacy-focused analytics service, to collect anonymous usage data. All data collection is:

  • • Anonymous: No personal identifiers are collected or stored
  • • Session-based: Session IDs change with each app launch
  • • User Journey Tracking: Anonymous user IDs persist across sessions for behavior analysis
  • • Aggregated: Data is combined with other users for insights
  • • Minimal: Only essential usage data is collected

Why We Collect This Information

We use anonymous analytics data to:

  • • Improve User Experience: Understand which features are most valuable
  • • Fix Issues: Identify and resolve app performance problems
  • • Debug Crashes: Analyze crash reports to fix stability issues quickly
  • • Guide Development: Focus on features users actually need
  • • Optimize Performance: Ensure the app runs smoothly on all devices
  • • Analyze User Journeys: Understand how users navigate and discover features over time
  • • Measure Retention: Track app engagement and user return patterns (anonymously)
  • • Maintain Privacy: All analysis is done without any location or identifying information

Data Security and Privacy

Data Storage and Processing

  • • Local Storage: Analytics data is stored locally on your device first
  • • External Processing: Anonymous data is sent to PostHog servers for analysis
  • • Anonymous User IDs: Consistent anonymous identifiers enable user journey analysis without revealing identity
  • • No Personal Profiles: We cannot identify individual users from the data
  • • Automatic Deletion: Local data is automatically limited to the last 1,000 events

Third-Party Services

We use PostHog (posthog.com) for analytics processing. PostHog:

  • • Is GDPR and CCPA compliant
  • • Does not sell user data
  • • Provides data processing agreements for privacy compliance
  • • Allows data export and deletion upon request

Data Retention

  • • Local Device: Last 1,000 analytics events only
  • • PostHog Servers: Follows PostHog's data retention policies
  • • No Long-term Storage: We do not maintain long-term user profiles

Security Measures

  • • Encryption in Transit: All data is encrypted during transmission
  • • No User Identification: Data cannot be traced back to individual users
  • • Secure Storage: PostHog provides enterprise-grade data security
  • • Access Controls: Only authorized CineMath developers can access analytics

Your Privacy Rights

Your Data Rights

  • • Transparency: This privacy policy fully discloses our data practices
  • • Minimal Collection: We collect only what's necessary for app improvement
  • • No Consent Required: All data is anonymous and does not require explicit consent under GDPR
  • • Clear Purpose: Data is used solely for app improvement, not marketing or sales

Regional Privacy Laws

For EU/UK Users (GDPR)

  • • Anonymous usage data does not constitute personal data under GDPR
  • • No consent is required for anonymous analytics
  • • You have the right to contact us with privacy questions

For California Users (CCPA)

  • • We do not sell personal information
  • • We do not collect personal information as defined by CCPA
  • • Anonymous usage data is not considered personal information

For All Users

  • • Contact Us: Email us with privacy questions
  • • Automatic Analytics: Anonymous analytics are automatically collected to improve the app
  • • Transparency: This policy provides complete visibility into our practices

How We Use Your Information

Website Analytics: To understand user behavior, improve our website design, and optimize user experience.

Customer Support: To respond to your questions, feedback, and support requests.

Product Development: To identify popular features and prioritize improvements to our calculator app.

Marketing: To measure the effectiveness of our marketing efforts and understand which features resonate with users.

Data Sharing and Third Parties

PostHog: We use PostHog for analytics. PostHog is GDPR-compliant and processes data according to their privacy policy.

Vercel: Our website is hosted on Vercel, which may process technical data for hosting purposes.

No Data Sales: We never sell, rent, or share your personal information with third parties for marketing purposes.

Legal Requirements: We may disclose information if required by law, court order, or to protect our rights and safety.

Cookies and Tracking

Essential Cookies: We use minimal cookies necessary for website functionality, such as remembering your dark mode preference.

Analytics Cookies: PostHog may set cookies to track user sessions and behavior patterns.

Third-Party Cookies: We do not use third-party advertising cookies or tracking pixels.

Cookie Control: You can control cookies through your browser settings and delete existing cookies at any time.

Technical Details

Data Format

Anonymous data includes:

- Event name (e.g., "calculator_used", "app_crashed")
- Anonymous session ID (changes each app launch)
- Anonymous user ID (consistent across sessions for journey analysis)
- Device characteristics (type, OS version, screen size)
- Usage timestamps
- Feature interaction patterns
- Crash data (stack traces, error codes, crash recovery events)

Anonymous User IDs

We use anonymous user identifiers to understand user behavior patterns:

  • • What they are: Random strings like "user_a1b2c3d4e5f6" that cannot identify you personally
  • • Purpose: Enable analysis of user journeys and retention across app sessions
  • • Privacy protection: Cannot be linked to your name, email, device, or any personal information
  • • Apple compliant: Meets Apple's privacy requirements without requiring tracking consent
  • • Local generation: Created on your device, not derived from external sources

Crash Data Collection

We collect technical crash information to maintain app stability:

  • • What we collect: Stack traces, error messages, app state at time of crash
  • • What we don't collect: Personal data, calculation values, or user content from crashes
  • • Purpose: Identify and fix bugs that cause the app to crash or malfunction
  • • Privacy protection: Crash data contains only technical debugging information
  • • Automatic detection: App automatically detects and reports crashes anonymously

Location Privacy

We do not collect any location information:

  • • GPS data: We do not access device location services
  • • IP-based location: We have disabled location tracking in our analytics service
  • • Privacy protection: No geographic data is collected or stored
  • • Result: Complete location privacy for all users

Data Accuracy

Analytics data is used for trends and patterns only. We:

  • • Do not make decisions affecting individual users based on this data
  • • Use aggregated data for app improvement decisions
  • • Regularly review data collection practices for privacy compliance
  • • Cannot identify or contact individual users from anonymous user IDs

Contact Information

For privacy-related questions or concerns, please contact us:

Privacy Inquiries: privacy@cinemath.app

General Support: support@cinemath.app

Company: Bradford Operations LLC

Subject Line: "CineMath Privacy Inquiry"

Response Time: We respond to privacy inquiries within 48 hours

Policy Updates

This privacy policy was last updated on June 28, 2025 to reflect:

  • • Addition of PostHog analytics integration with enhanced privacy controls
  • • Implementation of anonymous user IDs for user journey analysis
  • • Addition of crash data collection for app stability improvements
  • • Confirmation of zero location data collection (complete location privacy)
  • • Clarification of anonymous data collection practices
  • • Updated data security and retention information

We will notify users of material changes to this policy through:

  • • App Store update notes
  • • Website notifications
  • • In-app notices (if significant changes)

Your continued use of our website after any changes constitutes acceptance of the updated policy.

This privacy policy reflects CineMath's commitment to user privacy while enabling data-driven app improvements. We collect only anonymous usage data necessary to provide the best possible experience.