Built for the 2026 to 2027 MCAT
Everything you need to master the MCAT, built around you.
An adaptive plan, a bank of 3,565 exam style questions, every mistake turned into a map, and an honest readiness score. One complete prep, all the way to test day.
Free to start, no credit card. Your plan is built in two minutes.
Contents
Most MCAT prep is a dozen disconnected tools and a plan you fall behind on.
PrepCat is one complete prep instead. Your plan, your practice, your mistakes, your content, and your readiness, all in one place and all pointing at the same thing, your test day. So you always know you are on track.
The plan
This is what your week actually looks like
Not a static PDF. A living calendar that weights your weak sections, paces to the hours you really have, and rebuilds around a missed week without breaking your goal.
Week 6 · Practice phase
Swipe to see your whole week
Your week
Every session, in its place.
Keep scrolling to see the same week by the hour.
By the hour
Planned by the hour.
Every session has a start, an end, and exactly what to cover. Drag one and the rest of your day moves with it.
Today
One topic, four sessions.
Wednesday reads Enzymes and Kinetics, drills it, cards it, and files what went wrong. The next four chapters are those four sessions.
today: a chapter, its questions, its cards, its misses
The library
Six textbooks, written for this exam
Not a PDF of someone else’s notes. 72 chapters with 0 figures drawn for the page they sit on, about 32 hours of reading in all. Open a book and you see every chapter, how far you are in each, and which one your plan has you reading today.
MCAT · Bio / Biochem
Biochemistry
5 / 12
chapters mastered
Contents
12 chapters
the plan has you in this book at 9 AM today
Pick a cover to open it.
The question bank
0 questions, written like the real exam
Full passages with realistic figures, standalone discretes, and a deep explanation for every answer choice, the right one and the three traps. Run them as a tutor session or on the clock.
Passage 1 (Questions 1 to 5)
Researchers isolated a mutant form of lactate dehydrogenase from skeletal muscle and compared its kinetics with the wild type enzyme at 37 °C. Initial velocities were measured across a range of pyruvate concentrations while NADH was held at saturating levels (Figure 1).
Figure 1 Initial velocity as a function of pyruvate concentration
A second series repeated the assay in the presence of oxamate, a structural analog of pyruvate, and the apparent kinetic constants were
Question 2
Based on Figure 1, the mutation most likely changed:
Flashcards
Flash Card Engine 2.0, with PrepCat’s deck built in
Sourced from PrepCat’s six textbooks, chapter by chapter: 72 decks, 0 cards, and 3,363 of them carry a figure. Rate a card and the scheduler sets the day it comes back, right before it would slip.
rate it and it comes back right before you would forget
Your mistakes, connected
Every mistake becomes a map
Two topics link when they are related, so a gap in one shows you the others it drags down. Pick a topic to see what it connects to, and why.
Swipe sideways to move around the map.
today's topic, 3 misses
Five kinds of miss
Content gapTrap answerMisreadCarelessTiming
The score
Every part of the plan points at the same number
Your target sets the pace. The bank, the books, the cards, and the readiness score all work back from it, so the plan you follow in week one is the one that gets you there on test day.
0+
The score PrepCat is built for
Overall readiness · from your scores
Latest full length
Latest full length
Latest full length
Latest full length
Your exam
115 days to go
January 9, 2027
Tell us your target and test date
Get a plan built around you
Log every mistake you make
Watch your readiness climb
The plan’s three phases, as it names them.
Also in PrepCat
Everything else your prep needs
Practice aimed at your gaps, an advisor that edits the plan, handwritten hack sheets, 39 guides, spaced repetition, full length tracking, and an arcade for the boring parts. All in the same account.
Smart practice
Unlimited passages, aimed at your gaps
Fresh passages and questions generated around the exact topics you miss, with a Socratic hint that guides you instead of handing you the answer.
A biochemist prepares a buffer to hold pH steady during an enzyme assay. Which system best resists a change in pH when a small amount of acid is added?
Hint. A buffer works best when the weak acid and its conjugate base are both present in quantity.
The advisor
Talk to it like a tutor who has your plan
Ask for a lighter week, a vacation, or more practice questions. It makes the change for you and keeps you honest about staying on pace.
Your advisor
Knows your plan, and can change it
Hack sheets
Handwritten pages for the formulas and the memory hooks
One sheet per topic, with the equations boxed, the traps flagged, and highlighter on what to memorize. Rendered here exactly as the app draws it.
Motion, forces, and energy
Every mechanics and energy formula on the exam, plus how to use them.
Kinematics
Forces and rotation
Work, energy, and power
Deep guides and lessons
Spaced repetition, zero setup
An arcade for the boring parts
Full length tracking
Total 472 to 528
Why PrepCat
A complete prep, not another tool to juggle
It plans, it drills your weak spots, it maps your mistakes, and it keeps you honest about your score. One system does what a shelf of separate tools cannot.
Questions
Good things to know
Start your complete MCAT prep in two minutes
Your test date is not moving. Start today, put every remaining day to work, and see your first week laid out before you spend a cent.
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