Premade, expert-curated flashcard decks + FSRS scheduling for AWS and Azure. Study 15 minutes a day, walk in ready.
Free to join · No spam · We'll only email you when it's live
01 — Pick your cert
02 — Study smarter
03 — Pass with confidence
The problem
You read the docs and watch the videos — then most of it is gone by exam day. The forgetting curve is brutal: up to 80% lost within 48 hours.
The fix
CertStax pairs expert-curated decks with FSRS spaced repetition — a steady review rhythm that keeps recall sharp instead of letting it fade.
Why you can trust every card
Every CertStax card is built from the official exam guide and run through a 29-stage pipeline that fact-checks, grounds, and adversarially reviews it before it ever reaches you.
Which feature lets an Auto Scaling group launch replacement instances across multiple Availability Zones automatically?
Multi-AZ Auto Scaling with health checks
Built from the certification's own objectives and vendor documentation — never forum dumps or brain-dumps.
Each card targets a single exam objective, so coverage maps 1:1 to the official blueprint — no blind spots.
A second AI model attacks every card for ambiguity and errors; weak cards are rewritten or cut, then queued for human review.
Every answer links back to its source, and decks are versioned so corrections reach you automatically.
They all work — until you account for the hours of deck-building, the unverified content, and the guesswork about whether you're ready.
= partial. Anki's FSRS scheduling is best-in-class — the trade-off is that you build and maintain every deck yourself.
AWS and Azure foundational and associate certifications are first, with CompTIA and GCP next. Don't see yours? Join the waitlist and tell us which cert you're studying — demand drives our roadmap.
No. Every card is built from the official exam guide and run through a 29-stage pipeline that scores quality, adversarially reviews each card with a second model, queues weak cards for human review, and grounds every answer to a cited source. It's AI-assisted, not AI-guessed.
They're complementary. Video courses are great for first exposure to a concept; CertStax is what makes it stick. Watch to learn, then use spaced repetition so you actually remember it on exam day.
FSRS (Free Spaced Repetition Scheduler) is the modern, open algorithm that predicts when you're about to forget a card and schedules its review for that exact moment. It's the same science used by medical students and language learners — and it's why 15 focused minutes a day beats hours of re-reading.
Pro is $12.99/month, $89/year (our most popular plan — about $7.42/month), or a one-time $299 for lifetime access with all future certifications included. There's a free tier to get started, and every paid plan is backed by a 14-day money-back guarantee.
We're finishing our expert-curated decks now. Join the waitlist and we'll email you the moment it's live — no spam in between.
We're finishing up our expert-curated flashcard decks. Join the waitlist and we'll let you know the moment it's ready.
Free to join · No spam · We'll only email you when it's live
Like WaniKani for cloud and cybersecurity certs — structured, progressive, and impossible to outgrow.
Every card maps to real exam objectives. Blind spots glow amber.
Cards arrive at the precise moment you're about to forget. Hard cards return sooner. Mastered cards fade away.
Watch every card progress from New → Learning → Review → Mastered. When the pipeline is green, you're exam-ready.
Every deck is crafted by our 29-stage AI pipeline, mapped to official exam guides.