Privacy and support
Last updated November 9, 2026
The short version: Most Likely Dx keeps as little as it can. No ads, no tracking, and nothing is ever sold. If you never sign in, your games stay on your own device. If you do sign in, your name and results are saved so your streak follows you and your groups can see how you did. You can delete everything yourself at any time.
If you don't sign in
Your games, streak, level and settings are saved only in your browser or phone (local storage). Nothing about you is sent to us. Clearing your browser data or deleting the app removes it.
If you sign in
You can sign in with Google (or with Apple in the iPhone app). We then store:
- From your sign-in: an account ID and your email address. Google or Apple may also share your name. Your email is never shown to other players. With Apple, you can choose to hide your email.
- Your profile: the display name you choose and the level you study for.
- Your games: your guesses and results for each case, so your stats and streak work on every device.
- Your groups: which groups you're in. Members of a group see each other's display names and daily results (how many guesses, solved or not). They don't see your email.
- Daily totals: each case keeps an anonymous count of how many players solved it and in how many guesses. It does not say who.
This data is stored with Google Firebase (Firebase Authentication and Cloud Firestore), which runs our sign-in and database. It is used only to run the game.
What we don't do
- No ads and no advertising or analytics trackers.
- We don't sell or share your information with anyone for marketing.
- We don't use your data to train AI.
The iPhone app
The app shows the same game as the website and follows this same policy. The daily reminder is scheduled on your phone itself; no server sends it, and you can turn it off in the app or in iPhone Settings. Links to outside sites (like StatPearls) open in Safari, where those sites' own policies apply.
Deleting your data
Signed in, open the Group menu and choose Delete my data. That removes your profile, your results, your group memberships and your sign-in account. Groups you made are deleted too. If you'd rather, email us and we'll delete it for you.
Children
Most Likely Dx is made for students and professionals in medicine. It isn't directed to children under 13, and we don't knowingly collect their information.
Not medical advice
Most Likely Dx is for education and fun. The cases are fictional and simplified. Nothing here is medical advice or a substitute for clinical judgment. It isn't affiliated with NBME, NBOME or USMLE.
Changes
If this policy changes, we'll update this page and the date at the top.
Support and contact
Questions, a problem with a case, or help with your account: email the Most Likely Dx inbox. Most Likely Dx is made by Matthew Correll.
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