Privacy Policy

Last updated: 26 August 2026

Calibrate is a study tool for admission exams. This page explains what we collect and why. If anything here is unclear, email jacobleex4@gmail.com.

What we collect

• Nothing, if you do not sign in. Practice progress is stored in your own browser and never sent to us.
• If you sign in with Google: your email address, name and profile picture, supplied by Google. We do not receive your Google password.
• If you create a username: that username, so it can be reserved for you.
• Practice results, once signed in, so your progress follows you between devices.
• If you subscribe: payment is handled entirely by Stripe. We never see or store your card number.
• Anonymous usage statistics, such as page views and country. No advertising profile is built.

What we do with it

We use this information only to run the service: to sign you in, keep your progress, reserve your username and manage your subscription. We do not sell your data. We do not share it with advertisers.

AI features

The AI Tutor and Learn sections send the text of your question to Anthropic to generate a reply. Do not enter personal or sensitive information into them. Those messages are not used to build a profile of you.

Who else processes your data

• Supabase — accounts and saved progress
• Netlify — hosting
• Stripe — payments
• Anthropic — AI tutoring replies
• Google — sign-in, if you choose it

Children

Calibrate covers exams taken by children. Accounts are intended for parents, guardians or teachers. If you are under 13, please ask an adult to create and manage the account. If you believe a child has created an account without permission, email us and we will delete it.

Your rights

You can ask us to show you, correct, or delete everything we hold about you, at any time, by emailing jacobleex4@gmail.com. You can also delete your account from within the app, which removes your profile and saved results.

Cookies

We use a small number of cookies to keep you signed in. We do not use advertising or tracking cookies.

Changes

If this policy changes materially, we will note it here and update the date above.