Choosing a question bank is the biggest study decision for USMLE Step 1, now that the exam is pass/fail and the goal is efficient, confident preparation rather than chasing a number. This guide compares the leading Step 1 qbanks in 2026 — what each does well, where it falls short, and who it suits. Pricing and question counts are approximate and current as of mid-2026; always confirm on each provider's site before buying.
A quick note on the landscape: Step 1 became pass/fail in January 2022, with the passing standard set at a three-digit 196 behind the scenes. Most students need to answer roughly 60% of questions correctly to pass, so a qbank that builds reasoning and exposes knowledge gaps matters more than ever. When comparing banks, weigh four things: question quality and how closely they mimic the NBME style, the depth and clarity of the explanations, how predictive the self-assessments are, and the price for the subscription length you actually need.
UWorld — the established standard
UWorld has dominated USMLE prep for two decades and is used by the large majority of US medical students. Its Step 1 bank holds roughly 3,600 to 4,000 exam-style questions with detailed, image-rich explanations, a realistic test interface, and the most widely trusted self-assessments. The trade-offs are price — it is the most expensive option, with subscriptions running from a few hundred dollars up to around $700 depending on length — and a question style that some find more direct than the current NBME exam. Best for: almost everyone, as the primary bank during dedicated study. Most students do a full first pass system by system, then reset for a second pass during dedicated study.
AMBOSS — qbank plus integrated library
AMBOSS pairs a strong Step 1 bank of roughly 2,800 to 2,900 questions with a full, searchable medical library you can open beside each question, plus a Bayesian score predictor and an Anki add-on. Its questions are often felt to mirror NBME stem length and logic closely, and a one-year plan typically runs well below UWorld, with a 5-day free trial and 50 free questions a month on the standard membership. Best for: students who learn by reading around each question, and those wanting NBME-style practice with a built-in reference. The library is the real differentiator — jumping from a question straight into a full article speeds up filling gaps.
Kaplan — structured and course-friendly
Kaplan offers a large Step 1 bank with timed and tutor modes, audio questions and integrated explanations, and pairs naturally with its courses and live events. It is a solid, well-organized option, particularly for learners who want structure during preclinical years. Best for: preclinical study aligned with a course, or learners who like a structured program. It is less commonly used as the sole dedicated-study bank than UWorld.
USMLE-Rx and Lecturio — content-linked and budget-friendly
USMLE-Rx links its questions tightly to First Aid, making it a natural early-preclinical companion. Lecturio bundles a qbank with extensive video content and stands out for a generous free tier of over 1,000 questions, at the lowest annual price among the major platforms. Best for: early preclinical reinforcement (USMLE-Rx) or video-led learners on a budget (Lecturio).
Free and adjunct resources
Do not overlook free, high-value tools: the NBME Free 120 is official practice and essentially required; community Anki decks such as AnKing are free and excellent for spaced-repetition retention; and Sketchy's visual mnemonics are popular for microbiology and pharmacology. These complement rather than replace a full qbank. Many US schools also provide free institutional access to UWorld, AMBOSS or another bank, so check before paying out of pocket.
iatroX — AI-tutored, adaptive and affordable
iatroX is a newer entrant built around an in-question Socratic AI tutor, blueprint-mapped questions, spaced repetition grounded in retrieval-practice evidence, and an adaptive engine, all in a mobile-first app. Its USMLE question pool is smaller and less battle-tested than the decade-old incumbents, so it works best as an affordable, AI-guided supplement — for targeted practice, on-the-go review, and learners who want explanations that coach reasoning rather than just give the answer. A subscription is $29/month or $99/year via the app, and free sample questions let you judge the fit before paying. Best for: budget-conscious or international candidates wanting AI-tutored, adaptive practice alongside a primary bank.
How to choose
For most students the answer is UWorld as the core bank during dedicated study, supported by free spaced-repetition tools and, optionally, a second resource like AMBOSS for weak areas or a budget option for early practice. Match the platform to how you actually learn and when you are studying, and use free trials and sample sets to test the fit before committing. Whatever you choose, a bank only works if you review every explanation, right and wrong, and revisit your mistakes — passive question-clicking is the commonest way to waste a subscription.
Common questions
Which USMLE Step 1 qbank is best? For most students, UWorld as the primary bank, given its question quality, realistic interface and trusted self-assessments; AMBOSS, Kaplan, Lecturio and others suit specific budgets and learning styles.
Do I need more than one qbank for Step 1? Not necessarily — one well-reviewed bank done thoroughly beats several done superficially, though many students add a second resource to target weak areas.
What is a passing score on Step 1? Step 1 is pass/fail; behind the scenes the passing standard is a three-digit 196, and examinees typically need to answer roughly 60% of questions correctly.
Are free USMLE question banks any good? The NBME Free 120 is official and essential, and free Anki decks and Lecturio's free tier add real value, but most students still use a comprehensive paid bank for full coverage.
Is iatroX good for USMLE Step 1? It is a newer, affordable, AI-tutored and adaptive option that works best as a supplement to a primary bank; free sample questions let you try it before subscribing.