Prep Simulator for USMLE® Step 1

Rehearse Step 1 before you sit it

Original exam-style vignettes for every system, lessons that explain the science, and 20 full-length mock exams in the current 14-block format.

Coming soon on Google Play

Everything for Step 1 in one app

Question bank

500 practice questions in each of 18 topics, covering every subtopic. Tutor mode explains each answer; timed mode gives you 90 seconds a question.

20 mock exams

14 blocks of 30 minutes, 20 questions a block, 55 minutes of break time. Closed blocks stay closed, as on the day.

Lessons and guidelines

A lesson for every subtopic, the exam format and scoring explained, study planning, test-day advice and reference lab values.

What you get

  • Exam-day tools. Flag questions, cross out options, open lab values, see the block clock.
  • Every answer explained. The reasoning, why each other option is wrong, and one line to remember.
  • Scoring at the end. Percent correct, a readiness estimate, and your results by topic and discipline.
  • A progress board. Mock score trend, weakest topics, daily goal, streak and what to work on next.
  • Your account, any phone. Sign in with Google or email and your progress follows you.
  • Works offline. Questions live on your phone, and progress syncs when you reconnect.

Topics covered

Biochemistry, Genetics & NutritionGeneral Pathology & PharmacologyMicrobiology & ImmunologyHuman DevelopmentBlood & ImmuneBehavioral HealthNervous System & Special SensesMusculoskeletalSkinCardiovascularRespiratoryRenal & UrinaryGastrointestinalReproductive, Pregnancy & BreastEndocrineMultisystemBiostatistics & EpidemiologyCommunication, Ethics & Patient Safety

Step 1 is reported only as pass or fail. Scores in this app are estimates from HomiLabs questions, not USMLE results. Always check current rules at usmle.org.