Privacy Policy
Last updated: June 19, 2026
Overview
Equation Universe ("we", "our", "the app") provides an interactive platform for exploring mathematics and physics. This policy applies to our website at equation-universe.vercel.app and the Equation Universe Android app distributed on Google Play.
Information we collect
- Usage data: Anonymous analytics (if enabled) such as page views and feature usage via Google Analytics when configured.
- Local storage: Progress, bookmarks, and preferences stored on your device via browser localStorage. This data stays on your device.
- Email (optional): If you join the waitlist or newsletter, we store the email you provide to send updates.
- Payment data: Subscriptions are processed by Stripe. We do not store full payment card numbers.
How we use information
- Provide and improve the Equation Universe experience
- Save your learning progress and preferences locally
- Process subscriptions and respond to support requests
- Send optional newsletter or product updates you opt into
Third-party services
We may use:
- Vercel (hosting)
- Stripe (payments)
- Google Analytics (optional analytics)
- OpenAI (optional AI Guide feature, Pro tier)
- Supabase (optional catalog hosting)
Children's privacy
Equation Universe is an educational product suitable for students. We do not knowingly collect personal information from children under 13 without parental consent. Contact us to request deletion of a child's data.
Data retention & deletion
Waitlist and newsletter emails are retained until you unsubscribe. Local app data can be cleared by clearing app storage in Android settings or browser data on web. Contact us to request deletion of account-related data.
Contact
Questions about this policy: privacy@equationuniverse.app