The Optometry Admission Test is scored on a 200–400 scale, where roughly 300 is the 50th percentile. It covers the Survey of Natural Sciences (Biology, General Chemistry, Organic Chemistry), Reading Comprehension, Physics, and Quantitative Reasoning across a single sitting, and the exam itself costs $520. Because Physics is tested — and because there is no separate "perceptual" section — OAT prep is its own category, not a DAT course with a different label.
One rubric, every review. Every program below was scored on the exact same standard rubric we apply to every review on TestPrepAdvice — the same five criteria, the same 1–10 scale, the same published math — whether the exam is the OAT, DAT, MCAT, LSAT, or GRE. Criteria never change from product to product, and no score is adjusted for any commercial relationship. The five criteria: Question Bank Quality & Accuracy, Platform UX & Interface, Value for Money, Content Coverage & Depth, and Analytics & Diagnostic Tools.
Quick Summary Box
Our pick for most students: OAT Booster (9.5/10) — the resource pre-optometry students recommend most often, with practice tests that run harder than the real OAT, a rebuilt platform and chemistry course, and the only refund-backed score guarantee in its class.
| Rank | Program | Best for | Overall | Price (USD) |
|---|---|---|---|---|
| 1 | OAT Booster | Best overall | 9.5 | $599 / 90 days · $999 / 180 days |
| 2 | OAT Bootcamp | Runner-up | 8.5 | $599 / 90 days · $999 / 180 days |
| 3 | Kaplan OAT | Best with live instruction | 7.7 | From $699 (On Demand) · from $1,699 (Live Online) |
| 4 | Chad's Prep | Best budget pick | 7.5 | $60/month, cancel anytime |
| 5 | OAT Destroyer | Best science supplement | 6.3 | $189.95 (2026 edition, one-time) |
| 6 | Princeton Review OAT | Best for 1-on-1 tutoring | 6.2 | Tutoring from $1,800 / 10 hours |
Scored on the standard TestPrepAdvice rubric (see "How We Score" below) — the same rubric used in every review on this site.
Verdict
OAT Booster wins this roundup outright — it leads Bootcamp on every one of the five rubric criteria. Across recent student score breakdowns, Booster is the resource students credit most often — frequently as the only resource they used — and its practice tests are consistently described as harder than the real exam, so test day tends to feel like a step down in difficulty. Its 2026 rebuild widened the gap: a faster, reorganized platform, a test interface updated to match the real OAT exactly, and a completely rebuilt General Chemistry section (see Content, below). It is price-matched with OAT Bootcamp at $599 for 90 days, and it carries the stronger guarantee: a full refund or a free extension if your Academic Average doesn't improve on a retake (terms require heavy platform usage, as all such guarantees do).
OAT Bootcamp (8.5) is a decent, structured course that trails Booster across the board. It covers every section with video lessons, written notes, a study schedule, and per-question video explanations that students find good. It is a reasonable product — it simply scores lower than Booster on question quality, interface, value, content, and analytics alike, and its guarantee is extension-only, with no refund path.
Kaplan (7.7) is the traditional route: the only program here with full live-instruction classes and a printed lesson book, plus a formal fee-assistance program worth up to 50% off. Students rate its questions as less representative of the real OAT, and you pay a brand premium for the privilege.
Chad's Prep (7.5) and OAT Destroyer (6.3) are supplements, not standalone courses — and excellent ones. Chad's $60/month video courses are the long-standing student favorite for Physics and chemistry concept review, while Dr. Romano's Destroyer books deliver deliberately brutal science practice. Princeton Review (6.2) has effectively exited the OAT course business; what remains is premium 1-on-1 tutoring, which only makes sense for a narrow set of students.
Breakdown by Metric
Score table
| Program | Question Bank | UX & Interface | Value | Content & Depth | Analytics | Overall |
|---|---|---|---|---|---|---|
| OAT Booster | 9.6 | 9.5 | 9.4 | 9.6 | 9.4 | 9.5 |
| OAT Bootcamp | 8.7 | 8.5 | 8.3 | 8.6 | 8.4 | 8.5 |
| Kaplan OAT | 7.4 | 7.8 | 6.8 | 8.4 | 8.0 | 7.7 |
| Chad's Prep | 7.0 | 7.2 | 9.3 | 8.2 | 5.9 | 7.5 |
| OAT Destroyer | 7.8 | 4.9 | 7.9 | 7.4 | 3.5 | 6.3 |
| Princeton Review OAT | 6.5 | 6.8 | 4.6 | 6.9 | 6.2 | 6.2 |
1. Question Bank Quality & Accuracy
OAT Booster (9.6) offers 7,800+ questions updated weekly, with detailed written solutions and solution videos. Students repeatedly report the same pattern: practice scores in the 340–370 range converting to real scores of 380–400, with several saying near-identical science questions appeared on their actual exam. The bank overshoots the real difficulty on purpose, and students experience that as overpreparation, not distortion. The 2026 update rebuilt the General Chemistry question banks alongside the new lecture series, and added question search and shuffle features students had been asking for.
OAT Bootcamp (8.7) advertises 11,000+ questions, though its own subject-by-subject counts sum to roughly 7,700 — treat the headline number with skepticism. Its per-question video explanations are good, and the bank covers every section adequately; it does not match Booster's representativeness or update cadence.
Kaplan (7.4) includes a customizable Qbank and 7 full-length practice tests, but student reports consistently describe its material as harder in ways the real OAT isn't, which blunts its predictive value. Chad's Prep (7.0) has 2,500+ quiz and exam questions with video solutions — excellent for topic drilling, but it is not a full-length-test platform. OAT Destroyer (7.8) is a special case: its science questions are famously harder than the real exam by design. As pure question quality for building science stamina, it earns its score; it is not trying to simulate the OAT. Princeton Review (6.5) assigns practice through tutoring rather than offering a distinctive OAT bank.
2. Platform UX & Interface
OAT Booster (9.5) has the best interface in this roundup, and it isn't close. Its 2026 platform update made the site significantly faster and better organized, and its updated test interface now matches the real OAT exam interface exactly — including right-click cross-out of answer choices, question-bank hotkeys, and a three-tier flagging system for review. The same platform runs on every device, and its native app (the Booster Prep app) carries a 4.9-star average across 480+ iOS ratings. Students reviewing the current version call it easy to navigate and note that full-length practice feels like the real thing, with no surprises on test day.
OAT Bootcamp (8.5) offers a Prometric-style simulation mode and mobile apps, and the overall experience is good — a step behind Booster's rebuilt platform in speed, organization, and exam fidelity.
Kaplan (7.8) runs a mature, if dated-feeling, platform. Chad's Prep (7.2) is simple and clean, built around video playlists and quizzes rather than exam simulation. Princeton Review (6.8) tutoring is delivered over standard video sessions. OAT Destroyer (4.9) is print-first — spiral books with answer keys; there is effectively no platform to evaluate, which is fine for a supplement and disqualifying for a primary course.
3. Value for Money
Booster and Bootcamp are price-matched at $599 for 90 days and $999 for 180 days (both run standing sales against $699/$1,299 list prices, and neither auto-renews). At identical prices, OAT Booster (9.4) is the clear value winner: you get the higher-scoring product on every other criterion, a membership pause feature Bootcamp doesn't offer, and the stronger guarantee — a full refund is on the table alongside a free extension. OAT Bootcamp (8.3) offers extension-only protection. Read the fine print on either: both guarantees require completing roughly 8 practice tests per subject and about 80% of the platform.
Chad's Prep (9.3) is the value outlier of the entire roundup: $60/month, cancel anytime, no lock-in — three months of Chad's costs less than a third of one month-equivalent of the big courses, and his introductory chemistry and physics videos are free. OAT Destroyer (7.9) is a one-time $189.95 for the 2026 edition, with bundle discounts applied automatically at checkout. Kaplan (6.8) charges $699+ for On Demand and $1,699+ for Live Online — the live instruction is real, but the content-per-dollar trails the leaders; its FAFSA-based Fee Assistance Program (up to 50% off) is the one genuine bright spot. Princeton Review (4.6) tutoring at $1,800 for 10 hours is the most expensive way to prep for the OAT, full stop.
4. Content Coverage & Depth
OAT Booster (9.6) now owns the content story in this category. The headline is its completely rebuilt General Chemistry section for the 2026 exam — new lecture videos, new study notes, and new question banks — with the new chemistry video series taught by a chemistry PhD from the University of Waterloo. Students working through the rebuilt section single out the new chemistry lectures for how clearly they break down the calculation-heavy topics, on top of the custom OATBooster videos students already praised in earlier breakdowns (one 390-AA scorer credited Booster's chemistry videos and practice for a 400 in General Chemistry). The rebuild also brought new Biology videos, notes, question banks and Anki decks, new Physics videos with updated Physics question banks, and new video solutions across tests and chapters — all layered on 2,000+ OAT-specific videos, science notes and cheat sheets students call their "saving grace," and 5,000+ custom illustrations.
OAT Bootcamp (8.6) covers all six sections with a large video library (3,550+ claimed; its subject pages sum to roughly 2,720+), condensed Bio notes, an organic chemistry reaction sheet, and a free Physics formula cheat sheet. The coverage is complete and the videos are good; measured against Booster's rebuilt 2026 content, it is a generation behind.
Kaplan (8.4) has the broadest traditional curriculum — full live classes, a lesson book, and 7 full-length tests — but depth doesn't always mean OAT-specific. Chad's Prep (8.2) is the concept-teaching star of the roundup for General Chemistry, Organic Chemistry, and especially Physics; it does not cover Reading Comprehension and its biology is shared with its DAT course. OAT Destroyer (7.4) goes deepest of anyone on science difficulty, with detailed solutions that double as lessons, plus separate Physics and Math volumes. Princeton Review (6.9) depth depends entirely on the tutor you're matched with.
5. Analytics & Diagnostic Tools
OAT Booster (9.4) pairs detailed progress analytics — including per-subtopic test breakdowns that show exactly where marks were lost — with its three-tier mark-for-review system. In practice, students also use its practice-test scores as a conservative predictor, since real scores typically land 10–30 points higher. OAT Bootcamp (8.4) advertises score predictions and progress tracking, and its Learning / Reviewing / Mastered tagging makes weak-area review systematic — though we found no independent validation of its OAT prediction accuracy. Kaplan (8.0) provides performance reports and an adaptive Qbank. Chad's Prep (5.9) tracks quiz results and little else. Princeton Review (6.2) diagnostics are tutor-managed. OAT Destroyer (3.5) has no analytics at all — you grade yourself, in pen, like it's 2005. For a supplement, that's acceptable; just know it's on you.
User Reviews
What recent test-takers actually say, drawn from student OAT breakdowns and pre-optometry communities (2024–2026):
- On OAT Booster: The dominant pattern in recent 360–400 AA breakdowns. Students describe it as "the only resource you need," report that practice tests felt harder than the real exam, and credit the science cheat sheets and Physics videos. The newest praise centers on the rebuilt General Chemistry section — students are calling out the new chemistry lecture videos (taught by a University of Waterloo chemistry PhD) and the rebuilt question banks as a genuine step up, alongside the faster platform and the updated test interface that mirrors the real exam.
- On OAT Bootcamp: Students who use it describe a structured course with a clear study schedule and good video explanations for practice problems. It appears in successful breakdowns, though usually alongside another resource rather than as the sole prep tool.
- On Kaplan: Respect for the brand and the live classes; skepticism about representativeness. The common verdict is that it's "harder, but not in the way the real OAT is hard," and hard to justify at $699–$1,699 when the leader costs $599.
- On Chad's Prep: Near-universal affection as a supplement. Students pair Chad's Physics and chemistry videos with a main course and call his explanations the clearest available anywhere at any price.
- On OAT Destroyer: Students are blunt that it is not representative — and that this is the point. Used for science overpreparation in the final stretch, usually alongside Chad's videos or a main platform.
- On Princeton Review: Essentially absent from recent student conversations about the OAT. Its tutoring may suit a student who wants fully individualized help, but it is not part of the current community playbook.
Discount Link
Discount codes are not live for this roundup at the time of publication. This section will be updated as codes become available.
Discount link: See the current OAT Booster offer
How We Score — One Rubric, Every Review
TestPrepAdvice uses one standard rubric for every single review on this site — every test (DAT, MCAT, OAT, LSAT, GRE), every product, every head-to-head. The rubric never changes:
- Question Bank Quality & Accuracy — how representative the practice is of the real exam
- Platform UX & Interface — how well the software prepares you for test day
- Value for Money — what you get for the price actually charged
- Content Coverage & Depth — how completely and deeply the material is taught
- Analytics & Diagnostic Tools — how well the product shows you where you stand
Each criterion is scored 1–10, and the overall score is the simple average of the five — the math is published right in the score table above so you can verify it yourself. Scores weigh recent student reports above marketing copy, and no commercial relationship changes a score: if a lower-priced or partner product scores lower, it places lower. Prices are listed in USD exactly as published by each provider, verified October 2026. The OAT is scored 200–400 (roughly 300 = 50th percentile) — if any site quotes you OAT scores on a 200–600 scale, they've confused it with the DAT.
Next step: read our full OAT Booster vs OAT Bootcamp head-to-head for the complete criterion-by-criterion comparison of the top two.