Free MCAT prep · no account · runs in your browser
Baseline is a free study tool for the Medical College Admission Test (MCAT). It folds an adaptive question bank, a spaced-repetition flashcard engine, and a full set of CARS practice passages into a single page that runs entirely in your browser — no account to create, nothing to install, and no paywall in front of the studying itself.
Baseline is an independent study aid. It is not affiliated with, endorsed by, or sponsored by the Association of American Medical Colleges (AAMC), which produces and administers the MCAT.
Most question banks show you problems in a fixed order and leave you to guess what to review next. Baseline works the other way around. Every question you answer updates a retention estimate for the specific topic it belongs to — one of the AAMC content categories, a flashcard deck, or an equation set. The engine then weights your next question toward the topics where your retention is lowest and your last review is oldest, so your time always flows toward your weakest material instead of the material you already know.
A section reaches full mastery only when every unit inside it has independently cleared a 90% retention threshold with real attempts behind it. That deliberately stops a handful of strong topics from hiding a few weak ones behind a comfortable-looking average — the failure mode that produces a disappointing test-day score after months of feeling prepared.
The MCAT is scored across four sections, and Baseline tracks your progress in all of them separately:
Inside the three science sections, Baseline also tracks the four AAMC Scientific Inquiry and Reasoning Skills — knowledge of concepts, scientific reasoning, research design, and data-based reasoning — per section, because being strong at data reasoning in a physics passage doesn't automatically mean you're strong at it in a psychology passage. CARS gets the same treatment across its three official reasoning skills.
Baseline wraps its studying in a light idle-game layer: correct answers dispatch trains, lay track, and grow a small rail network over the weeks you study. This isn't decoration for its own sake. The hardest problem in self-directed MCAT prep isn't understanding the material — it's coming back every day for months. The game layer turns a daily review streak into something with visible, compounding progress, so the habit survives the weeks when motivation doesn't. If you'd rather ignore it, you can: the studying works identically whether or not you ever look at the map.
Three in-depth guides go deeper into the reasoning behind the tool:
Yes. The adaptive question bank, the flashcards, and the CARS passages are free to use with no account. Optional extras exist, but none of the core studying is behind a paywall.
No. Your progress is saved locally in your own browser, so you can close the tab and pick up where you left off without signing in anywhere.
No. Baseline is an independent study aid. The MCAT is a program of the Association of American Medical Colleges, which neither produces nor endorses this tool.
The difference is the adaptive engine and the per-unit mastery model. Instead of a fixed list, Baseline continuously steers you toward your weakest, least-recently-reviewed topics, and it won't call a section mastered until every unit inside it clears the threshold on its own.
Yes. Baseline is a responsive web app and can be added to your home screen, so it behaves like a lightweight installed app on mobile as well as desktop.
It stays in your browser. See the privacy page for details on what is and isn't collected.
Baseline — a free MCAT practice trainer. Independent and not affiliated with the AAMC. © 2026 Baseline.