Prepstellar
Get it on Google Play

How it works

Learn it. Test it. Keep it.

A pile of practice questions is not a course. This is what happens between opening your first lesson and walking into the exam.

The loop

Four steps, repeated for every concept

A course is a few hundred concepts. Each one goes through the same short loop, so you always know what to do next.

  1. A lesson, written out and playing as narrated audio
    01 · Learn

    Read it or hear it

    Every concept is a short written lesson with narrated audio. On the page or in your headphones, it is the same material.

  2. A practice question with four options
    02 · Practice

    Ten questions, right away

    Score seven out of ten and the next concept opens. Miss it and you know exactly what to reread.

  3. The AI tutor answering a question about the current lesson
    03 · Ask

    Stuck? Ask the tutor

    The AI tutor knows which concept you are on. It answers within your course, not about the cloud in general.

  4. Spaced review: what is due today and this week
    04 · Review

    It comes back before you forget

    What you got wrong returns on a schedule. Get it right three times in a row and it stops showing up.

When the loop is done, full mock exams are weighted by domain, like the real thing.

Read a free lesson Get it on Google Play

Rule one

Every question traces back to the source

We write with the vendor's current study guide open, and every claim is checked against the documentation before it reaches you.

Where most prep comes from

  • A forum thread
  • Someone's memory of last year's exam
  • A syllabus that was right in March

Where ours comes from

  • The vendor's current study guide
  • The official documentation
  • A new check whenever the exam changes

Wrong answers come from the same page as the right one. A distractor is a real value from the real documentation, altered. That is why practice feels like the exam and not like a quiz.

The mix

Ten questions per concept, on purpose

All easy leaves you overconfident. All hard wears you down. The mix tells you honestly where you stand.

Always current

When the exam moves, the content moves

Vendors add services, retire others and re-weight domains. We rewrite the concept that changed, not the whole course, and show you what changed and when.

  1. Official docsEvery lesson traces back to the vendor's current study guide and documentation.
  2. Checked every dayWe monitor exam guides and vendor docs daily.
  3. Caught the same dayA new objective, a retired service, a changed exam: we know that day.
  4. Updated in hoursThe lesson is rewritten and in your app in hours, not days.

The whole course, on your phone

Lessons you can read, audio you can listen to on the way to work, and practice that remembers what you got wrong.

Get it on Google Play

“This app is the ‘One Lake’ for preparing the certification exams. Really worth it.”

Abdelhak Y. Google Play review