Privacy Policy

Overview

This site (9708economics.com) is a free bilingual study resource. Reading the notes never requires an account. The optional free account exists only to sync your practice progress between devices and — if you join a class — to let your teacher see your practice.

For any question about this policy or your data, contact leonandlife@gmail.com.

What we collect

• Without an account: nothing. Your progress (answers, notes, highlights, flashcard schedule) lives only in your browser's localStorage and never leaves your device.
• With a free account: your name, email, password (stored hashed by our authentication provider — we never see it), and your practice data — MCQ answers, flashcard reviews, quantitative drills, AO-skills drills, and essay / data-response self-assessments.
• Teacher enquiries: if you contact us through the pricing page we store the name, email, school and message you submit.

How it is used

• To show you your own learning analytics (mastery, weak topics, mistakes to review).
• Class transparency: if you join a class with a join code, that class's teacher can see your practice attempts and self-assessments in order to teach you. This stops if you leave the class or delete your account.
• To understand site usage in anonymous, aggregate form and improve the content.

We do not sell personal data and do not use it for advertising.

Processors (services we use)

• Supabase — database and account authentication (account profiles and practice data are stored here).
• Vercel — website hosting and content delivery.
• Plausible Analytics — cookieless, privacy-first visit statistics (EU-hosted). It collects no personally-identifiable information; we only see anonymous aggregate traffic.
• Sentry (when enabled) — error monitoring that helps us find and fix site breakage.

AI examiner feedback: when (and only when) you actively click the "AI examiner feedback" button, your submitted answer text and that question's official mark-scheme points are sent via our server to Anthropic's API (Claude models) for marking, and an estimated mark with per-objective feedback is returned. Anthropic does not use this data to train AI models. Each marking call's usage (question id, model used, token counts and cost) is logged against your account and visible only to you and the site administrator; the answer text itself is not additionally stored in that log.

Cookies & local storage

This site uses no advertising or tracking cookies. Your browser's localStorage holds interface preferences (language, theme, font size), study progress, and — when signed in — the session token that keeps you signed in. Clearing your browser data removes all of it.

Retention, export & deletion

• Account data is kept until you delete your account.
• You can export a copy of your data any time from the account page.
• Deleting your account (type DELETE on the account page) immediately and permanently removes it and all associated data.

Students & minors

This site is designed for students preparing for Cambridge International exams (typically ages 16–19). If your country requires guardian consent for minors to use online services, please use the account features with the consent of a parent, guardian or school.

Changes

If this policy changes materially we will update the "Last updated" date above. Significant changes will be flagged on the site.