Practice answers stay local
When you work through a practice form, your answers are held in your browser’s local storage on that device. They are not uploaded and no account exists to attach them to. Clearing your browser storage deletes them, and using a different device starts fresh — that is a limitation of the design rather than a gap in it.
The readiness check
Submitting a readiness check does send something to the server, because the point of it is a percentile against other people. What is stored is the exam, the version of the quiz, the month, the score, how many questions were answered, which items were missed, and a random one-time value used to stop a single attempt being counted twice. No name, no email address and no account identifier is stored with it, and the row cannot be traced back to a person.
A per-address daily limit stops one person filling the cohort. It works on a keyed hash of the address rather than the address itself, and those entries are purged once their month closes.
Score emails
If you ask for your score by email, the address is used to send it and is passed to Resend, which delivers the mail and keeps the address on a list so a short prep series can follow. That is the whole purpose and the form says so at the point of asking. Every message carries an unsubscribe link. The site itself keeps no copy of your address.
Analytics
Page views and interactions are recorded with PostHog to see which pages are useful and where people give up. It runs with in-memory persistence, which means it sets no cookies and does not follow you across visits or across sites. Session recordings are captured on the public site to diagnose broken flows.
Analytics runs only on aicertificates.study. Nothing is sold, and nothing is shared with advertisers, because there are none.
Processors
- Vercel — hosting and content delivery.
- Neon — the database holding readiness check rows.
- PostHog — product analytics and session recording.
- Resend — sending score emails, where you asked for one.
Your choices
To remove an email address, use the unsubscribe link in any message or write to the address on the contact page. A readiness check row carries nothing that identifies you, so there is nothing in it to look up or delete on request — if you would rather not submit one at all, the practice forms work perfectly well without ever sending anything.
This page changes when the site does. Material changes will be described here rather than quietly applied.