Our Quality Pledge
Every explanation, checked before you see it.
Most AI-first prep tools write explanations on the fly — and are widely reported for getting them wrong. A confidently-wrong explanation doesn’t just waste your time; it teaches you the wrong thing. So we do the opposite: every explanation we publish is verified for correctness before it ever reaches you.
How we verify every explanation
Written, not improvised
Each explanation is authored with the full worked solution and a reason every wrong answer is wrong — not generated on the fly the moment you click, where mistakes slip through unseen.
Independently checked
A separate verification pass re-derives the answer from scratch and audits the arithmetic, the logic, and every distractor rationale. Agreement is the bar — not a single model’s first guess.
Fail closed
If an explanation does not pass that check, it is pulled. You never see an explanation that failed review — the question falls back to a plain answer key until we fix it. We would rather show less than show something wrong.
Found a mistake? We fix it.
We’re not perfect, and we don’t pretend to be. You can report any question from inside the app, and a real person reviews every report. If something’s wrong, we fix it — and re-run it through the same verification. That feedback loop is exactly the part the generate-it-live tools skip.
Where we are today
We’ve verified thousands of explanations across the SAT bank and are expanding toward full coverage. Anything still in review shows a plain, correct answer key in the meantime — never an unverified walkthrough dressed up as one.
See it for yourself — take a short diagnostic and read the explanations.
Try the SAT freeQuestions about how we build the bank? support@unlimitedtests.com