StudyPebble

Legal

Privacy Policy

What StudyPebble collects, why it collects it, who it goes to, and how to get it deleted.

Last updated
April 16, 2026
Applies to
studypebble.com and all StudyPebble apps

1.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.

Anonymous test results. When a diagnostic or full length test is finished we store its score against a random visitor id, with no name or email, to measure how scores change with practice.

2.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 written responses using AI (your answers are sent to Anthropic's Claude API for grading and are not stored by Anthropic)

3.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.

4.Third party services

These are the providers that receive data in order for StudyPebble to work, and what each one gets.

Supabase
Authentication and database hosting

Holds your account, your practice history and your progress data.

Stripe
Payment processing

Handles subscription checkout and billing. We never see your card number.

Anthropic (Claude)
AI explanations and grading

Your written answers and chat messages go to Anthropic. Nothing identifying you is sent with them.

Vercel
Application hosting

Serves the site and the app.

PostHog
Product analytics

Which pages and features get used, plus a random visitor id.

TikTok
Advertising measurement

On signup and subscription we send a hashed email, IP address, browser user agent and the amount paid.

Reddit
Advertising measurement

Which pages were viewed and whether a visit led to a signup or a subscription. No email or scores.

5.Cookies and similar technologies

We use essential cookies to keep you signed in. We also use analytics and advertising tools that set cookies or similar identifiers: PostHog, for product analytics such as which pages get used, and TikTok, which measures whether an ad led to a signup or a subscription.

We also use the Reddit pixel, which sets a cookie so Reddit can tell us whether one of our Reddit ads led to a visit, a signup or a subscription. We do not send Reddit your email, your answers or your scores.

When you subscribe we send TikTok a one-way hashed version of your email address along with your IP address and browser user agent so it can match the conversion. We do not send them your practice answers or your scores.

6.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.

7.Your rights

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

8.Contact

Questions about this policy? Email support@studypebble.com, or use our contact page.

Terms of Service

Our terms live on a single page so there is never a question about which version applies. Read the Terms of Service.