What we collect

When you create an account, we collect your email address for authentication. When you practice, we store your question attempts, skill mastery data, and study progress. This data is used solely to power the adaptive learning engine and show your personal dashboard.

How we use your data

• Provide adaptive question selection based on your performance
• Track your mastery progress and predict scores
• Generate personalized study plans
• Process payments through Stripe (we never see your card number)
• Grade FRQ responses using AI (your answers are sent to Anthropic's Claude API for grading and are not stored by Anthropic)

Data storage

Your data is stored in Supabase (hosted on AWS) with row-level security. Practice data is also cached in your browser's localStorage for offline access. You can delete your account and all associated data at any time by contacting us.

Third-party services

• Supabase — authentication and database hosting
• Stripe — payment processing
• Anthropic (Claude) — AI-powered FRQ grading
• Vercel — application hosting

Cookies

We use essential cookies for authentication only. We do not use tracking cookies or third-party analytics.

Children's privacy

StudyPebble is designed for students. We do not knowingly collect personal information from children under 13 without parental consent. If you are under 13, please have a parent or guardian create an account on your behalf.

Your rights

You can request access to, correction of, or deletion of your personal data at any time by emailing alekokourtidis@gmail.com.

Contact

Questions about this policy? Email alekokourtidis@gmail.com.

Service

StudyPebble provides adaptive practice questions, score prediction, and AI-powered FRQ grading for SAT and AP exam preparation. We are not affiliated with or endorsed by the College Board. SAT® and AP® are registered trademarks of the College Board.

Accounts

You may use StudyPebble without an account (data stored locally in your browser). Creating an account enables cross-device sync. You are responsible for maintaining the security of your account.

Subscriptions

Free tier: 10 questions per day, all subjects, forever. Pro subscription: unlimited practice, AI explanations, FRQ grading, score prediction, and study plans. Subscriptions are billed monthly or annually through Stripe. You can cancel at any time — no fees, no questions.

Refunds

If you are unsatisfied with Pro, contact us within 7 days of purchase for a full refund.

Content

All practice questions are original, written against official College Board Course and Exam Description (CED) skill codes. We do not reproduce copyrighted College Board exam questions. SAT questions used in the app are from officially released, publicly available College Board practice tests.

Limitation of liability

StudyPebble is provided "as is." We do not guarantee specific test scores or outcomes. Use of the service is at your own discretion.