First Aid is a list of facts with no teacher. The First Aid Guide added the teacher to every page. Now there is a tutor on top of every page — one you can actually ask.
By Dr. Marish Asudani · Published · Updated
Yes. USMLE Vault has an AI tutor built on Gemini Pro, behind an "Ask anything" button on every screen, Anki included. It already knows which First Aid page you are on, so you just type what you're stuck on. Every study answer comes in 3 steps: what it is in simple words, the mechanism step by step, and how the exam tests it. You get 30 questions a day. Answers are AI-generated, so check anything surprising against the First Aid page.
The First Aid Guide takes all 646 pages of First Aid and teaches them one page at a time. Every page carries the same five parts, in the same order:
| Focus On | the 1 idea on this page that the exam actually cares about |
| Concept Walkthrough | the page explained in plain language, in reading order |
| How is this tested? | Common Confusion → Core Concept → The Trap → Your Approach |
| Key Takeaways | what to keep after you close the page |
| Test Yourself | MCQs on that exact page — not that chapter, that page |
Underneath are the ELI5s — the plain-English stories behind each heading, explained in the ELI5 guide. If you have never seen a Guide page, see one before you read on.
That covers most of what a student gets stuck on. Most — not all. At 11pm, on page 603, when the walkthrough still hasn’t landed, there is nobody to ask. That is the gap the tutor closes.
It is a round button on every screen — “Ask anything”. Tap it, type what you don’t understand, and it teaches it to you right there. You never leave the page you were on.
I built it on Gemini Pro, Google’s strongest model. For medicine it is the best tutor I have found — it explains, it doesn’t just recite.
Open it on a First Aid Guide page and the top of the chat reads “You’re on First Aid guide · Renal · page 603”. It knows the system, the page, the screen — FA Guide, Anki, your schedule, an assessment.
So you skip the setup. You don’t type “I’m studying renal, I’m on the nephron page, I don’t get…”. You type the 4 words you’re actually stuck on, and it answers for the page you’re on.
This is the part that makes it a tutor and not a search engine. Every study answer is built the same way, every time:
| 1 · What it is (and why it happens) | explained as if to a bright 5-year-old — everyday words, 1 real-life analogy, every abbreviation spelled out |
| 2 · How it happens | the actual mechanism, step by step, in order — still simple, now complete |
| 3 · Why it matters for the exam | how the USMLE tests it: the classic vignette clue, the buzzwords, the commonest wrong answer, the lab or graph shift, and 1 bolded line to memorise |
Step 3 is the one nobody else gives you. It is the same thing the Guide’s “How is this tested?” block does for the page — now on demand, for your exact question.
Ask “why do ACE inhibitors cause a cough?” and you get: first the plain story (the enzyme that clears a cough-causing chemical is switched off, so it builds up); then the mechanism (ACE also breaks down bradykinin; block ACE and bradykinin accumulates in the airway); then the exam (dry cough on a new antihypertensive → switch to an ARB, because ARBs don’t touch bradykinin — and the same bradykinin explains angioedema). Three layers, one answer, about a minute.
Ask it “How do I reset my schedule?” or “Give me a quick tour of the app” and it switches shape: short numbered steps, naming the exact screen and the exact button.
When a free guide answers your question better than a chat can, it says so and links it — the road to exam day, the new Anki modes, how to do UWorld. It is told never to invent a screen or a link that doesn’t exist.
The tutor is not a fifth resource. Before UWorld you attack First Aid from 4 angles — read it, test it, think with it, recall it (the RPSR method explains why). The tutor is the teacher you call in when any one of those 4 stalls:
| Reading the Guide | the walkthrough or an ELI5 doesn’t land → ask, on that page |
| Test Yourself | you got 1 wrong and the explanation didn’t fix it → ask why your answer was wrong |
| Mehlman | you can’t see how a clue rules an option in or out → ask for the exam step (Mehlman guide) |
| Anki | a card keeps coming back as “Forgot it” → ask, right on the card (Anki guide) |
| UWorld review | an explanation you read twice and still don’t get → paste the idea and ask |
Ask the confusion, not the topic. “Why is renin high in renal artery stenosis but low in Conn’s?” beats “explain renin”.
Say what you think first. “I think X because Y — where am I wrong?” gets you a correction aimed at your actual mistake.
Vague is fine. Type “I don’t get this” on a page and it will either ask you 1 short question or pick the most likely confusion and explain that.
Then go back to the page. The tutor explains; First Aid is still the address. Close the loop with the Test Yourself MCQs.
You get 30 questions a day, and your chats are saved so you can scroll back. Answers are AI-generated — if one surprises you, check it against the First Aid page. That is the right habit anyway: the page is what the exam tests.
The First Aid Guide — the 646 pages the tutor is built on
ELI5, Test Yourself and Rule out — the page’s own explanations, and elimination
Anki: two decks, two modes, First Aid on every card — where the tutor helps most
The RPSR method — the 4 angles on First Aid before UWorld
Week 1 to exam day — the whole road, before you start