Explanations written for the mistake you made.
Not one canned paragraph bolted to the item, but an answer to the reasoning you actually used.
Stop guessing whether you're ready.
Exam fees are real money, and taking it a second time costs the same again. Acedify teaches to the gaps in your knowledge, measures where you actually stand, and tells you when to book.
platform.acedify.com/sat/today
Today
7 scored sittingsProjected total score
1280–1350
Queued for today
Everything in here is clickable.
The question nobody can answer for you
You've done the practice. You've read the material. And sitting underneath all of it is the only question that actually matters: am I ready — or am I about to pay the fee and find out I'm not?
Almost everyone guesses. They book when the deadline arrives, when they run out of patience, or when one practice test happens to go well. Acedify exists to turn that guess into something you can act on.
It teaches. It doesn't just test you.
Every answer tells Acedify something — not only whether you were right, but which idea was missing when you weren't. That's what shapes the next thing you see.
A path that reshapes itself.
Get a concept solidly and it stops taking up your time. Miss it and the next items come at the same idea from a different angle, pitched at the difficulty where you're learning rather than guessing or coasting.
Open-ended work, actually marked.
On TOEFL Writing and Speaking, Acedify assesses what you produced against the rubric criteria and names the one that cost you the points — instead of handing you a model answer and leaving you to grade yourself.
Practice where it pays.
Time is the scarce resource. What to work on is ranked by how much it would move your score, so the hour you have tonight goes to the topic with the most left in it.
How the estimate works
Acedify scores you, not your answer sheet.
Every item in the bank carries a difficulty. When you answer, the engine updates an estimate of your underlying ability — item response theory, the same class of model the organisations behind the real tests use to build them. A hard item answered correctly moves your estimate more than an easy one. An easy item missed costs more than a hard one. A session where you happened to draw a gentle set of questions doesn't inflate your number.
That ability estimate is mapped onto the exam's own scale — a real 400–1600 on the Digital SAT, a band on IELTS, a grade on a national exam — and weighted section by section the way the published blueprint weights them.
What comes out means something specific: the score the model expects from you, given your performance on items of known difficulty. When it clears the bar for your exam, that's your signal to book.
It's an estimate, so it carries a range. The range narrows the more you practise, and we show you the range rather than just the midpoint.
Why this matters to us
Good exam coaching has always existed, and it has always been expensive: private tutors, prep courses, and the second and third attempt when the first one doesn't land. The people for whom the result actually changes something — a job, a university place, a move abroad — are usually the ones who can least afford to get it wrong.
Bringing down the cost of certainty is the point. The measurement that used to require a testing organisation's psychometrics team now runs for anyone, on every attempt. That's the part worth democratizing — not the questions, which are everywhere and mostly free, but knowing what your answers mean.
Where we're going
Every decision the product makes should come from evidence rather than an editor's hunch: which item you see next, when a topic is finished, when you've plateaued and more drilling is wasted time, what your chance of passing actually is today. Across this industry most of that judgment still sits with human course designers. We think it belongs in a model that sees every attempt anyone has ever made.
From practice into teaching.
The engine already knows which idea you're missing. The natural next step is teaching it — instruction generated for the gap in front of you, rather than a course you have to go and find elsewhere.
From one learner to a cohort.
The same evidence, shared: a teacher, mentor or training lead seeing who's ready to book and who needs another week — without anyone maintaining a spreadsheet.
More exams, continuously.
Acedify is built for any exam that is high-stakes, scheduled and scored on a published scale — professional certifications, university entrance, language tests, national school-leaving exams. 20 live today, and the list grows as fast as we can validate them.
Find out where you actually stand
Run a full simulation. You'll have a readiness estimate at the end of your first complete session, with the reasoning behind it.