Privacy Policy

Data Collection & Storage

CalcuMaster is designed with privacy-first principles:

Local-First Storage

• Calculation History: All your calculations, problem sets, and work are stored locally in your browser using IndexedDB
• User Preferences: Settings and preferences are stored in your browser's localStorage
• No Server Storage: We do NOT store your calculation data, mathematical expressions, or problem sets on our servers

What We Collect

• Analytics: We use Ahrefs Web Analytics to understand how visitors use our site (page views, session duration, referral sources)
• No Personal Information: We do NOT collect names, email addresses, or any personally identifiable information
• No Account System: CalcuMaster does not require registration or login

Third-Party Services

• Ahrefs Analytics: Collects anonymous usage statistics to help us improve the platform
• Google Fonts: Used for typography; Google may collect basic usage data
• No AI Data Collection: If you use AI-powered features, the mathematical expression is sent to our AI provider (Vercel AI Gateway) for processing but is NOT stored or used for training

Your Data, Your Control

• Browser Storage: All your work stays in your browser
• Clear Data: You can clear your calculation history anytime from your browser settings
• No Tracking: We do not track you across other websites
• Export Your Data: You can export problem sets to PDF anytime

Data Retention

• Local Storage: Persists until you clear browser data
• Analytics: Aggregated, anonymous analytics are retained by Ahrefs according to their privacy policy
• AI Queries: Not stored after processing

Your Rights

You have complete control over your data:

• Clear browser data to remove all calculation history
• Disable JavaScript to prevent analytics
• Use browser privacy modes for ephemeral sessions

Last Updated: November 2025