What the contest form collects
When you enter the Qrie Champion League at /challenge-register, we store: the student's name, their class, the student's mobile number, a parent or guardian's name and mobile number, a postal address, and whether the student takes tuition elsewhere.
The postal address is collected only so a prize can be posted to a winner. It is never shown inside the app and is never used to decide anything about a student's learning.
The parent's number is not verified yet. We do not send a confirmation code today, so we cannot prove that the person named as a parent agreed to anything. We store those two fields as what they are — text somebody typed — and we do not treat them as consent.
What the app collects
Opening the app creates an anonymous account automatically. It has no email and no phone number attached to it unless you choose to sign up later.
Against that account we keep what is needed to teach: the name, class and subjects you give the app, which classes you opened, your progress, and any notes you write in a class. If you report something in a class, we keep the report so a person can read it.
When you answer out loud, a speech service turns your voice into text. We never save the recording. For each answer, we keep what the tutor judged it to be and a short written copy of the answer, cut off at 200 characters, so we can check she marked it fairly. If the safety check flags an answer, we keep none of its words. A note of what the safety check noticed stays on your device and is not sent to us.
To teach you better, the tutor keeps a small notebook about you on your device: the hobbies you picked from a list, which topics of our own lessons felt hard or went well, what you raised your hand about (the topic, not your words), your last class, and the promise you chose at the end of it. We do not store it on our servers. When you ask a doubt, a few of its lines travel with your question through our server to Google Vertex AI, so the tutor can use them. Resetting your progress clears it (your hobbies stay until you change them); deleting your account, or a different signed-in student on the same phone, clears all of it. In a trial, nothing is written to it.
How long it is kept
The written copies of your answers, and the record of each class you sat, are deleted automatically 90 days after they reach us. A job inside the database does this every night.
Records of how much each class used — which service was called and how much work it did, never your words — have no automatic deletion yet. That window is being finalised; until then they are deleted when your account is.
Your account, your name, class and subjects, your progress, your notes, any report you sent and your contest entry are kept until you delete your account.
Deleting everything
Settings → Delete account removes the account and every row attached to it, including the contest entry, and clears the copy held on your device. It cannot be undone.
You can also write to hello@curie.study and ask us to do it.
Who else sees it
Nobody buys this data and we do not sell it. These services handle it so the tutor can run:
Supabase — our database and accounts, and the server that passes the tutor's requests on to Google.
Vercel — hosts this website and the tutor app. This website's own pages, though not the tutor app, also include Vercel's counter of page visits.
Google Vertex AI — the tutor's thinking, her voice and her hearing. To prepare a class it receives the topic, the class it is for, and a short summary of how you have been doing: which ideas you got right or wrong, what you raised a hand on, what you know well and what is still shaky, how many days in a row you have studied, and the last class you took — and, only for a page or topic of your own that is never kept for others, the hobbies you picked. If you bring your own page to learn from, it receives the words on that page. During a class it receives the lines she is about to say, so it can speak them; a recording of each answer you say out loud, so it can write it down; and what you ask or answer, so she can reply. When you ask a doubt, it also receives your class, how many days in a row you have studied, how many times you have raised a hand in that class, how well you seem to know what it teaches, and a few lines from your notebook: your hobbies, topics that felt hard or went well, what you raised a hand about, your last class and your promise. We do not send it your phone number, your address or your account. These requests go to Google's global service, so they may be handled outside India.
Wikimedia Commons — when a new class is being prepared, the app searches this free picture library for photos of the topic, so Wikimedia receives those search words.
Sentry (crash reports) and PostHog (usage counts) — the app can send to these, but they are switched off unless we turn them on. When they are on, reports are grouped by a random identifier made on your device and tied to nothing else. Usage counts carry numbers and short labels of our own, such as which screen was opened, and the app drops any text longer than 64 characters. Crash reports carry the error, where in the code it happened, and the page's address without anything after the "?".
Until late September 2026 some of this went through OpenRouter, which used Deepgram for her voice and her hearing. Neither is used for it now.