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 19-stage pipeline that checks learner quality, binds claims to vendor evidence, and closes the release 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.
Each card is checked for correctness, clarity, answerability, and exam relevance; defects are held out of the release path.
Learner-visible claims are matched to vendor evidence; unsupported cards are quarantined and only complete evidence bundles can ship.
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 scoped to official exam objectives and passes through a 19-stage pipeline that reviews learner quality, breaks answers into checkable claims, retrieves vendor evidence, quarantines unsupported cards, and closes the release only when its evidence is complete. 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 an open scheduling algorithm that updates a card's difficulty and memory stability from your review results. CertStax uses those estimates to choose efficient intervals for your target retention rate, so difficult cards return sooner while stable cards wait longer.
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.
FSRS adapts each interval from your review history toward a target retention rate. Hard cards return sooner; stable cards wait longer.
Watch every card progress from New → Learning → Review → Mastered. When the pipeline is green, you're exam-ready.
Every deck passes through our 19-stage quality and evidence pipeline, mapped to official exam objectives.