United States · Admissions testOAT prep options compared
| Option | Price | Free to use | Links |
|---|---|---|---|
| Official guides | |||
OAT 2026 Candidate GuideOfficial guide (PDF)The OAT Program’s rules and content specifications for every test, including the Organic Chemistry outline updated in June 2026. Use the version updated August 6, 2026. It has no practice questions. | No price listed; download from the OAT site | The whole guide, with no sign-in | |
OAT Reference Text ListOfficial reading list (PDF)Two pages naming 23 biology, chemistry, physics and math textbooks that OAT item writers use. The textbooks themselves are sold by their publishers. | No price listed; download from the OAT site | The whole list, with no sign-in | |
| Official practice test | |||
OAT practice test and test modulesOfficial practice test, online through PrometricQuestions written by actual OAT test constructors, following the test specifications. The full test takes 3 hours 35 minutes with no break, and each purchase must be used within 24 hours. | $100 for the full test of six modules, or $20 for each module | Nothing; the OAT Program sells it | |
| Courses and question banks | |||
OAT BootcampOnline question bank, videos and practice testsPro lists 11,000+ OAT questions and 3,550+ videos; Plus adds five extra practice tests each for biology, general chemistry, organic chemistry, reading and math. Every membership includes one pause token, and payment in four parts with Klarna or Afterpay is offered. | Bootcamp Pro $599 for 90 days, Bootcamp Plus $999 for 180 days (sale prices, from $699 and $1,299) | An account to start studying, and an OAT question of the day by email | |
Crack the OATOnline practice tests, videos and flashcardsLists 10 full-length mock exams of 230 questions in the real OAT’s section order, 10,000+ practice questions, 50,000+ flashcards and an AI tutor. No subscription or automatic renewal. | One-time payment: $199 for 1 month, $299 for 3 months, $599 for 1 year | A diagnostic test across all four sections, with no credit card | |
Chad’s Prep OAT PrepOnline video courseCovers general chemistry, organic chemistry, biology, physics and quantitative reasoning, with 50+ hours of video, study guides and 2,500+ questions with written and video solutions. You can cancel any time and keep access to the end of the month you paid for. The course page lists no reading comprehension section. | Monthly subscription; the course page doesn’t show the price | Creating an account | |
Prices and ratings checked October 2026.
Do you need an OAT prep course?
The OAT Program doesn’t say you do. It asks anyone thinking about a course to check carefully that the material matches the current content of the OAT. That matters more since June 2026, when the Organic Chemistry specifications were updated.
In the program’s 2025 Examinee Information Report, 59.0% of the examinees who answered said they took no review course at all.
OAT prep material from the OAT Program
- The Candidate Guide, with the content specifications for every test, the scoring rules and the test day rules.
- The OAT Reference Text List: biology, chemistry, physics and math textbooks that OAT item writers use.
- The official practice test, sold as a full test or as six separate modules through Prometric.
- The OAT tutorial, which you can explore on Prometric’s site and also get at the start of your appointment.
What to check before you pay for OAT prep
- Whether the organic chemistry material follows the specifications updated in June 2026.
- Whether full-length practice tests match the real format: 230 items across four tests, in the same order and timing.
- How long access lasts compared with your test date. Once your application is approved, you have six months to test.
- What a score or pass guarantee actually promises. The OAT has no passing score, and schools set their own expectations.
- Whether you can try it first. OAT Bootcamp and Crack the OAT both let you start without paying.
OAT question of the day and other free prep
- OAT Bootcamp emails an OAT question of the day each morning. It calls the service completely free.
- Crack the OAT has a free diagnostic test across all four OAT sections, with no credit card needed.
- OAT Bootcamp and Chad’s Prep let you create an account at no charge before you buy a membership.
Questions from prep companies are written by those companies, not by the OAT Program. Real OAT questions are confidential, and the Candidate Guide bans sharing remembered ones.
Books for OAT prep
The OAT Program doesn’t publish a review book. The Candidate Guide says items aren’t based on specific textbooks, and the reference list names the latest editions of standard college texts, such as Campbell and Reece’s Biology and Klein’s Organic Chemistry, as some of the sources item writers use. Prep company study guides are their own work.
Sources: OAT Program · OAT Bootcamp · Crack the OAT and 5 more. Checked October 2026.
- OAT Program: Apply for the OAT ↗
- OAT Program: OAT 2026 Candidate Guide, updated August 6, 2026 (PDF) ↗
- OAT Program: OAT Examinee Information Report, March 2026 (PDF) ↗
- OAT Program: OAT Reference Text List (PDF) ↗
- OAT Bootcamp: OAT Question of the Day ↗
- OAT Bootcamp: Upgrade Your Membership ↗
- Crack the OAT: OAT Exam Prep ↗
- Chad’s Prep: OAT Prep ↗
Rules and fees can change, so check the official site before your test.
Explore
Everything else, in one place
More about the OAT
Test sections