Learn as you test, grow as you go.

Expert-reviewed flashcards for SAP, Linux, Python and more — reinforced by repetition until you reach the level you’re aiming for.

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Expert-reviewed content

Every card is written and reviewed for accuracy — not crowd-sourced guesses. One question, one clear answer.

Spaced repetition

Cards come back right before you would forget them, so what you study actually sticks for the long term.

Learn your field

Many fields and topics, growing over time. Pick what you need and study a few cards a day.

The app

See it in action

Scenario-style questions that make you think — not trivia. Reveal the answer, rate yourself honestly, and KnowCard schedules the card to come back right before you’d forget it.

  • Short sessions — a few cards a day is enough
  • Every card traced to source material and official docs
  • Do-cards turn knowledge into step-by-step practice
KnowCard home screen showing cards due for review across topics
Your queue for today
A scenario-style SAP HANA question on a KnowCard flashcard
A question that makes you think
The revealed answer with commands and parameters highlighted
The answer, with the details that matter
AI explanation showing a real-world example with a code block
AI explanations on demand
A knowledge card linked to four Do-cards for the same topic
One card, four real procedures
A Do-card with prerequisites and numbered operational steps
Do-cards — step-by-step practice
From the library

A sample of cards

You need a detailed inventory of every USB device, and later a stuck USB device needs a nudge without unplugging. Which two commands help?
SAP insists RISE with SAP is an offering and not a product. What is the practical meaning of that distinction, and what did SAP tie exclusively to RISE in 2023?
What is the naming form of a standard (non-alert) HANA trace file, and what is the last component?
You need SLT to feed data toward cloud object stores like Amazon S3, Azure, or Google Cloud Platform. Which target scenario is that, and what was it formerly called?
What is the correct order of TCP server calls before you can talk to a client, and what does each step do?
When is defining a data extraction specification not needed, and what happens when it is?
Your system must send outbound email, fax, SMS and X.400. What single interface handles all of these, and where does the SMTP email actually get processed — a detail that decides where you troubleshoot?
Your AMDP debugger just won't stop at the breakpoint in a SAP BW/4HANA transformation routine. What's the most likely cause?
Pricing

Simple plans

Free

$0
  • A free selection of fields & topics
  • Spaced-repetition review
  • Favorites & progress basics

Pro

$9.99/mo · $59.99/yr
  • Every field and topic — full library
  • All answers unlocked
  • Do-cards — step-by-step how-tos
  • Full progress analytics
  • New content as it’s added

7-day free trial on all paid plans. Prices in USD — billed in your local currency by the App Store or Google Play.

Start learning today

Free to start — download the app or use it in your browser.

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