Privacy

What this app stores about you.

This is a revision app for the university modules it has in it, used by students the owner has invited. It is built and run by Billy Bridgewater, not by a company. It stores more about you than you might expect, and some of what you write is sent to another company to be marked or answered, so it is worth two minutes of your time.

What is stored

• Your account: your email address, your first name if you gave one, and your password if you set one (Supabase keeps it scrambled, not readable). Your email is how you sign in.
• Your modules and exam dates, so the plan can order your revision against the time left.
• Everything you write as an answer, and the marks it got, whether the AI tutor marked it or you did.
• Your notes, and photographs you upload, including photographs of handwritten work sent to the tutor.
• Your conversations with the tutor, in full, so they survive a reload.
• Your saved coursework coach conversations and the draft you pasted in, one per piece of coursework, until you press “Start again”.
• How often you use the AI features: a dated record of each Ask question, coach message and draft check, tutor message and photograph, flashcard deck you ask for, and “Try again” on an explanation. Only the time and the kind are kept, not the words. These records are what the daily limits count.
• Your flashcards: cards you write yourself, how you rated each card you have practised, and any fresh AI deck you asked for, which is linked to your account.
• Your revision profile, if you answered its questions: how you like to revise, which days, and topics you tend to avoid.
• If you connect a Whoop: the link to your Whoop account (the access tokens that let this app read it). Your sleep and recovery scores are read from Whoop to show them, not stored here. Health data is treated more carefully in law than the rest of this list, which is why connecting one is switched on only for accounts the owner names, at present only the app owner’s own account.

Your Ask questions themselves are not kept: only the fact that you asked one, and when. Your browser also keeps a few cookies: your sign-in, the module you are on, your light or dark setting, and your group on a group project.

What is sent to Anthropic (Claude), and when

The AI in this app is Claude, made by Anthropic, which processes what it is sent in the United States. This is the part most people would not guess, so plainly: what you type into these features leaves this app.

• The tutor: your messages, the recent conversation, and any photograph you attach.
• Marking: the answers you write, and photographs of your working or answers when you ask for them to be marked.
• Ask: your question, the recent questions and answers, the lecture text for the page you are on, and the picture of the slide you are looking at.
• Explain and Answer on lecture slides: the slide text and its picture. Nothing about you is sent. The result is saved and shown to the other students on that module, and contains no personal data.
• Flashcards: “Check my answer” sends the card and the answer you typed. Making an AI deck sends the topic’s module material, nothing about you.
• The coursework coach: your chat with it, and any draft you paste in for feedback.

Who else sees it

• Anthropic, as above.
• Supabase holds the database and the photographs.
• Vercel runs the app itself, and keeps ordinary server logs.
• The owner can see the list of accounts and their email addresses, and, as the person who runs the database, could read anything stored in it.

Nothing is sold, nothing is advertised against, and nothing is sent to your university or your lecturers. Other students using this app cannot see your work, your notes, your conversations or your fresh flashcard decks: the database enforces that, not just the screens. What other students do see is shared material with nothing of yours in it: slide explanations and answers, and each topic’s first flashcard deck.

Deleting things

• You can delete these yourself: your notes and their photographs, cards you wrote, and a saved coach conversation and its draft (“Start again” clears them).
• Your answers and marks can’t be deleted in the app, by design: your progress is worked out from them, and letting one be removed would let a bad mark be quietly erased. The same goes for photographs of work that has been marked, and for tutor conversations.
• You can ask the owner to delete your account and your data. Deleting the account removes your saved coach conversations automatically. Everything else is kept in places not tied to the account itself, so the owner deletes your rows and photographs by hand on request.

How long it is kept

Until you ask for it to be removed. There is no automatic deletion after your exams.

Asking for your data, or its removal

Email billy.bridgewater@bcn.co.uk. You are entitled to a copy of what is held about you and to have it deleted. Both are done by hand, because there is no button for either.

What this notice is not

This notice hasn’t been reviewed by Cardiff University’s data protection team. It is an honest description of what the software actually does, written by reading the code, and it is kept up to date as the code changes. If something here does not match what you see, the notice is wrong and the owner would like to know.

Last updated 9 November 2026. Back to sign in.