Adaptive certification prep
Study less.
Pass first try.
ZeroRetake's Gap Engine finds what you haven't mastered yet and drills only that — so you stop re-studying what you already know and get exam-ready in a fraction of the time.
$9.99 on Kindle → scan the code → unlock adaptive practice. No subscription.
The agent's final answer looks correct, but you must verify it actually wrote to the system of record. Which check belongs in the release gate?
Know before you go
Walk in when the number says go.
As you practice, ZeroRetake gives you a readiness score that predicts your real exam result — modeled on how the actual exam scores you, not a random pile of questions.
Above the passing line, you're ready — book it. Still short, keep drilling. No more guessing whether you'll pass.
Switch the card between Day one and Exam ready. Most people start below the line — a fail, and a $300 retake. You leave only when you're safely above it.
Projected score · passing line 700 · +123 to spare
Predicted from your practice — the readiness score you build before you ever book the seat.
Most prep teaches the subject. We rehearse the exam.
Four steps from the $9.99 book to a certificate you earned on the first try.
Read it once
A dense, no-filler study guide plus full-length practice tests — the Kindle edition that gets you in the door.
Open the Gap Engine
The code inside the book unlocks the Gap Engine for your exam. One-time $16.99, yours to keep through every attempt.
Drill the gaps
The Gap Engine keeps serving the domains you miss and tracks mastery per objective until the weak ones aren’t.
Sit it once
Go when your readiness clears the passing line. One seat, one attempt, one pass — that’s the whole point.
Not ready to buy? Get 10 free questions.
Tell us your email and we'll send 10 real practice questions — with worked explanations — straight to your inbox.
Own it. Don't rent it.
No monthly subscription bleeding you while you study. Buy the book, unlock the exam once, and keep it — through every attempt you won't need.
Before you ask
Is the content current?
Every exam tracks the vendor’s current exam guide — the official objectives — and new certs go up within days of launch. The agentic-AI wave is already live.
Is this official?
No — ZeroRetake is independent prep, not affiliated with the vendors. That’s why we can move faster and cost a fraction of official training.
How many questions do I get?
Full-length mock exams in the book, plus an adaptive bank that keeps generating fresh practice on your weak domains until you’ve cleared them.
What if I don’t pass?
Your next exam’s unlock is on us. Pass the first time is the promise in the name — if we miss, we make it right.
Is it a subscription?
No. $9.99 for the book, $16.99 once to unlock an exam’s practice engine. You keep it — no recurring charge, ever.
Which exams do you cover?
60+ across AWS, Azure, Kubernetes, NVIDIA, Salesforce, UiPath, GitHub, Snowflake, ServiceNow, Anthropic — plus NCLEX. Searching yours above is the fastest check.
0 retakes.
Pass the cert. The first time. That's the promise in the name.
Find your exam