Archer Review is the popular, affordable NCLEX choice — a large question bank, realistic adaptive (CAT) practice, and signature readiness assessments that predict your chance of passing. Trelos is a retention engine that teaches and auto-schedules spaced review so it sticks. Archer is strongest for realistic practice and knowing when you're ready; Trelos is strongest for building durable recall. Both are budget-friendly.
Archer Review has become one of the most popular NCLEX options, especially among budget-conscious candidates, with over a million students. Its strength is realistic practice and readiness prediction: a question bank of 3,100+ RN questions (1,600+ for PN), unlimited computer-adaptive (CAT) exams that closely mirror the real NCLEX — including the way the test shuts off once you're clearly above or below the standard — and its signature readiness assessments, which benchmark you against peers and predict your likelihood of passing. Archer reports that scoring "High" or "Very High" on four consecutive assessments correlates with a very high pass rate. It also includes 190+ hours of video lectures, detailed rationales, NGN-aligned item types, a mobile app, optional tutoring, and a pass guarantee on qualifying plans. Combo packages run roughly $89–$399 depending on access length — far below full content reviews that can run $200–$1,000.
Trelos is a complete prep engine built around retention science. Rather than a question bank you work through and self-assess against, it teaches each concept, drills it with exam-style and clinical-judgment questions, and then schedules your reviews using spaced repetition — resurfacing each concept right as you're about to forget it. It layers hypercorrection (re-teaching confident wrong answers immediately) and interleaving (mixing topics like the adaptive NCLEX) on top. The aim is durable recall across the NCLEX-RN and NCLEX-PN blueprint with review orchestration handled for you, mobile-first.
| Trelos | Archer Review | |
|---|---|---|
| Core model | Retention engine: teach → drill → auto-scheduled review | Question bank + CAT + readiness assessments |
| Spaced repetition | Core engine, automatic | Not a spaced-repetition engine |
| Readiness prediction | Retention/mastery tracking | Signature peer-benchmarked pass predictor |
| CAT simulation | Timed mock exams | Unlimited, closely mirrors the real NCLEX |
| Videos | Concept teaching built in | 190+ hours of lectures |
| Price | Free to start; annual subscription | ~$89–$399 combos (time-limited) |
| Best for | Building durable recall automatically | Realistic practice & readiness prediction |
Choose Archer if you want affordable, realistic practice, you value a trusted readiness/pass predictor to tell you when you're ready, and you like learning weak areas from assessment feedback plus video lectures. Its CAT simulation and readiness assessments are genuinely well-loved, and the pass guarantee on qualifying plans adds peace of mind at a low price.
Choose Trelos if you want the learning and retention handled for you — a system that teaches each concept, drills it, and automatically resurfaces it at the right moment so nothing slips across the NCLEX's huge surface of pharmacology, labs, and prioritization. It's retention-first rather than practice-first, and mobile-first for short study sessions.
Archer is an excellent value, and its readiness assessments are a real strength — few tools give you as trustworthy a signal of when you're ready to test. What Archer doesn't do is schedule your reviews around forgetting; it identifies your weak areas and leaves it to you to go back and shore them up. Trelos closes that loop by automating retention — teaching, drilling, and resurfacing each concept on a schedule. If your main need is realistic practice and a pass predictor, Archer is hard to beat for the price. If your main need is making the content actually stick across weeks of study, Trelos is built for that. Many candidates use both, and it's worth also seeing Trelos vs UWorld if you're weighing the premium option.
Try Trelos free for the NCLEXNo credit card. Feel the retention engine work in your first session.Read the full NCLEX-RN guide and NCLEX-PN guide, or see Trelos vs UWorld.