Privacy

CritThinker (critthinker.com) is a critical-thinking practice. For privacy questions, email critthinkerapp@gmail.com.

The scam check needs no account. Without an account, anything you save stays in this browser. We do not receive it.

If you create an account, we store only:

• your email address, so we can recognise the account when you sign in with your password
• your learning results: answers and attempts, levels, streaks, the daily helper, Mastery Test results, Certificate status, saved paths, favourites, reminder settings, and the other practice you keep in the app

If you take the CT Test, we store your answers, timings and any confidence ratings with your account, to check and improve the test. We don't collect age or other demographic details.

CT Test preview and email list

You can try the first 8 questions of the CT Test without an account. Your answers stay in this browser. If you enter your email to see your result, we store your email, the date, and your preview band. That is our legitimate interest in showing you the result you asked for. If you tick the daily card box, we also store that consent and the date, and we email you the daily card. That is based on your consent, which you can withdraw at any time with the unsubscribe link in each email or by emailing critthinkerapp@gmail.com. We keep list entries until you unsubscribe or ask us to delete them. If you then create an account, your preview answers are added to it.

We do not collect your name, age or location. We do not sell or share your data, and we do not use it for advertising. A short label taken from your email is stored only because the sign-in system requires one. We do not ask you for a name. If you start a membership, Stripe processes the card. We store the customer and subscription identifiers Stripe sends us, not the card number.

We keep the account so we can provide the service you asked for, and so we can keep that sign-in secure. That is our basis under UK GDPR: a contract with you for the account, and our legitimate interest in keeping it secure.

Password reset and the trial reminder are sent with Resend, to the email on the account. The account is stored in this app’s database. The database may process data outside the UK, with the safeguards the host provides.

We keep the account until you delete it. You can delete it at any time from your account page, and the saved progress goes with it. The same page has “Download my data”, which saves a JSON file of what we hold.

Under UK GDPR you can ask for access, correction, deletion, restriction, objection and portability. Email critthinkerapp@gmail.com. If you are unhappy, you can complain to the Information Commissioner’s Office (ico.org.uk).

The app uses your browser’s local storage so it can work, and a sign-in cookie if you sign in. There are no tracking cookies.

Trickle records only anonymous totals of players' Sharpness scores each day.

CritThinker accounts are for people aged 13 and over.