Something to report
Any issue or feedback — there is a “Report an issue” link under every question, or write to us directly. We respond within 24 hours.
Help & support
How can we help?
A real person reads every message. Replies usually come within a working day.
Common things
The three we hear most.
Billing, cancelling, refunds
Manage your plan and invoices from Billing — cancel in one click, and you keep access to the end of the period you paid for. Statutory rights are in the Terms; EU/UK customers should also read the cooling-off addendum.
Your data
Download everything we hold about you from Settings → Your data, as JSON. To delete your account and its data, write to privacy@mdcells.com.
What you should know
Does a subscription include mock exams?
No. The subscription ($50 a month) covers the question bank and flashcards across all three Steps. Mocks are sold separately — $40 each, or $100 for three from the same Step. Every account gets three mocks free — one for each Step, with no card and no subscription needed. There are 16 in all: 6 for Step 1, 6 for Step 2 CK, 4 for Step 3.
Can I retake a mock exam?
No. Each mock is a single sitting, with thirty days afterwards to review every explanation. After that the explanations and the mock itself lock. A mock score only means something if you have not seen the questions — which is also why those 2,560 questions never appear in the study bank. If you want another attempt, buy another mock.
Can I use this on my phone?
Yes — it runs in any mobile browser today, and native Android and iOS apps are coming soon.
What happens to my progress if I cancel?
Only the platform subscription can be cancelled, through the billing portal. It stops renewing from the next billing month; for the rest of the month you have paid for, you keep full access. After that you return to the free tier: 100 questions, 25 image cards, 25 text cards, and one free mock, for each Step.Your history and progress are kept — resubscribe any time and everything comes back.
How do I get a refund?
Refunds go straight back to the card or account you paid with.
I'm in the US — what is this arbitration thing?
The Terms include an arbitration agreement and class-action waiver for US residents. You can opt out within 30 days by emailing optout@mdcells.com with your name, account email, and the words “I opt out of arbitration.” Nothing else about your account changes.
Still stuck?
Write to us with your account email and, if it is about a question, its subject. That is usually all we need.