Privacy Policy

What we collect

We collect the minimum data needed to run CalibreOS: your email and authentication details, your learning progress (problems attempted, concepts read, quiz results), and standard server logs (IP, user agent) for security and debugging.

Payment information is handled entirely by our payment processor — we never see or store card details.

How we use it

Your progress data powers personalized spaced repetition, dashboard analytics, and recommended next topics. We don't sell your data, and we don't share it with advertisers.

Your rights

You can export or delete your account and all associated data at any time from your dashboard. We honor GDPR and CCPA requests within 30 days.

Contact

Questions about this policy? Email support@calibreos.com.