Privacy Policy
Last updated: 11/30/2025
Introduction
Welcome to Ultimate Calculus Solver. We respect your privacy and are committed to protecting your personal data. This privacy policy explains how we collect, use, and safeguard your information when you use our service.
Information We Collect
Account Information
When you create an account, we collect:
- Email address
- Authentication credentials (managed securely by Supabase)
- Plan type (free or pro)
Usage Data
When you use our service, we store:
- Problems you solve (input, commands, results)
- Favorites and history
- Exported files (PNG, PDF)
Analytics (Optional)
With your consent, we collect anonymized usage data via Plausible Analytics:
- Operation types and success rates
- Example usage patterns
- Feature interactions
- No personal data, IP addresses, or cookies
How We Use Your Information
- To provide and maintain our service
- To save your work and sync across devices
- To process payments via Stripe
- To send you service-related emails (with your permission)
- To improve our service (anonymized analytics only)
Data Storage and Security
Your data is stored securely using:
- Supabase: Database and authentication (encrypted at rest and in transit)
- Stripe: Payment processing (PCI-DSS compliant)
- Supabase Storage: File storage for exports
Your Rights
You have the right to:
- Access: Request a copy of your data
- Delete: Request deletion of your account and data
- Opt-out: Disable analytics at any time
- Export: Download your problem history
To exercise these rights, visit Settings or contact us at ultimatecalculussolver@gmail.com.
Third-Party Services
We use the following third-party services:
- Supabase: Data storage and authentication
- Stripe: Payment processing
- Plausible Analytics: Privacy-friendly analytics (with consent)
Changes to This Policy
We may update this privacy policy from time to time. We will notify you of any changes by updating the "Last updated" date at the top of this policy.
Contact Us
If you have questions about this privacy policy, please contact us at ultimatecalculussolver@gmail.com.