GMAT Prep

GMAT flashcards built from your prep books and error log

Paste your quant rules, upload a prep-book chapter, or drop in the questions from your error log, and Deckio turns them into flashcards covering the math formulas, grammar rules, and idioms the GMAT rewards. More than a card maker: tell Deckio your test date and it builds a study plan and tracks how ready you are.

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Free to start — no credit card required.

Add your GMAT material

Quant rules, grammar notes, prep-book chapters, or your error log.

Generate high-yield cards

Deckio pulls out the formulas, rules, and idioms the GMAT tests under time pressure.

Study to your test date

Review with spaced repetition and let Deckio resurface weak rules before test day.

How to actually use it

01Turn your error log into a deck

The highest-leverage GMAT material is your own error log — the questions you got wrong and the rule behind each miss. Paste those, or upload a prep-book chapter (Manhattan, Official Guide review sections) as a PDF, and Deckio turns the underlying rules into cards. The GMAT is a reasoning test, so focus the cards on the rule or pattern, not the specific question.

02Pick the card type by section

For Quant, use Q&A and cloze cards for formulas, number properties, and divisibility rules you must recall instantly. For Verbal, build cards for Sentence Correction grammar rules and idioms, and for the logical structure of Critical Reasoning answer types. Custom instructions like 'focus on idioms' or 'number properties only' keep each deck targeted.

03Drill to automaticity, then move on

On the GMAT, knowing a rule isn't enough — you need it instantly, because pacing is brutal. Review your cards daily so recall becomes automatic and frees working memory for the reasoning. Deckio's spaced repetition resurfaces each rule right before you'd forget it, and you retire cards once they're locked in.

Why GMAT prep needs a system, not just practice sets

The GMAT punishes slow recall. You can understand a number-properties rule perfectly and still lose the question because you hesitated and ran out of time. The fix is automaticity — making the formulas, grammar rules, and idioms instant — which frees your working memory for the actual reasoning. Active recall with spaced repetition is the most efficient way to build that automatic recall.

The other GMAT truth is that your error log is gold, and most people waste it. Every wrong answer points to a rule you don't yet own. Turning those rules into cards and drilling them is how scores move. When you set your test date in Deckio, it builds a study plan around your weak areas with a countdown and a readiness score, and resurfaces the rules you keep missing before the day.

Deckio turns your prep books, notes, and error log into the flashcards, quizzes, and review that the plan runs on — so your study hours go to closing real gaps instead of re-doing questions you already get right.

Who this is for

Quant: formulas and number properties on instant recall
Generate cards for the formulas, divisibility rules, and number properties the GMAT leans on, then drill them to automaticity so pacing on the Quant section stops being the bottleneck.
Sentence Correction rules and idioms
Build cards for the grammar rules and idiomatic constructions Sentence Correction tests, so you recognise the error pattern instantly instead of reasoning it out from scratch each time.
Working your error log around a test date
Set your GMAT date, feed Deckio your error log, and it builds a plan that targets your weak rules with a readiness score — so you always know where you still need work.

What it looks like

Input

GMAT number properties: a number is divisible by 3 if its digit sum is divisible by 3; product of consecutive integers is divisible by their count factorial; even × any integer = even.

Generated cards

Divisibility rule for 3?

A number is divisible by 3 if the sum of its digits is divisible by 3.

Is the product of 3 consecutive integers always divisible by 6?

Yes — among any 3 consecutive integers there's a multiple of 2 and a multiple of 3, so the product is divisible by 6.

even × odd = ?

Even — any integer times an even number is even.

Pre-made GMAT decks drill generic rules, but the score gains live in your own error log. Deckio builds cards from your weaknesses and prep books, trains them to instant recall with spacing, and wraps it in a study plan with a readiness score — so prep time closes real gaps instead of rehearsing what you already know.

Questions

Is the GMAT really a flashcard exam?+

Not in the rote sense — it's a reasoning test. But it rewards instant recall of quant formulas, number properties, grammar rules, and idioms, so that recall doesn't eat your time. Flashcards are the most efficient way to make those automatic; the reasoning you build through practice sets.

Can I turn my error log into cards?+

Yes, and it's the best use of Deckio for the GMAT. Paste the rules behind the questions you missed and Deckio builds a deck targeting exactly your weaknesses.

Can I make cards from a prep book?+

Yes. Upload a chapter from Manhattan, the Official Guide, or your notes as a PDF and Deckio extracts the rules and concepts. Free accounts handle up to 15 pages per PDF, Pro up to 150.

Does it cover both Quant and Verbal?+

Yes. Generate quant formula and number-property cards, and verbal cards for Sentence Correction grammar, idioms, and Critical Reasoning patterns. Custom instructions keep each deck focused on one area.

How does the study plan help?+

Set your test date and Deckio builds a plan around your weak areas, tracks a readiness score, and resurfaces the rules you keep missing before the day — so your prep targets gaps instead of strengths.

What does it cost?+

Free to start — 100 AI credits a month with cloud sync. Pro ($6/month) gives 1,500 credits, 150-page PDFs, and unlimited AI study paths; Ultimate ($12/month) gives 5,000 credits. There's a free 7-day Pro trial.

Start with your own notes

Upload a PDF, paste notes, or drop in a YouTube link. Get a first deck in under a minute.

Open the generator