The SAT coach that reads your mistakes.
Bluebook-style modules with real digital SAT questions. After each one, the coach tells apart reading mistakes, picking between the last two, and running out of time, and gives you the next step for that kind of question.
Passes from US$ 15, valid until your test day.
app screen, example
Everything that matters for test day, on one screen.
Days left, today's goal, your measurement trend and where you lose points: by domain, by skill and by kind of mistake. It updates after every module.
No mistake leaves orbit until it is confirmed.
Satu's ring is the method. Every missed question goes into orbit, comes back days later and only leaves when you get it right twice in a row.
- 1MeasureA 27-question module in 32 minutes, Bluebook style.
- 2DiagnoseFrom what you crossed out, the coach sees whether you misread or got stuck between two.
- 3FixOne concrete step for the next question of that type, saved to your error book.
- 4ReturnThe missed question comes back in training two days later.
- 5ConfirmTwo right in a row and it leaves orbit. Miss it again and it keeps circling.
Why you miss, not just how many.
You cross out the choices you rule out, just like on test day. Crossed out the right one? That was a reading problem. Down to two and picked the wrong one? That was discrimination.
Different mistakes need different training. A regular practice test only tells you that you missed.
How long you spend on each part of the test.
A module gives you 32 minutes for 27 questions, about 71 seconds each. The app times every question and adds it up by part: Craft and Structure, Information and Ideas, and Conventions plus Expression.
Why it matters: parts 1 and 3 are fast and part 2 is slow. Overspend early and you reach part 2 short on time, missing questions you knew. A low score can be a pacing problem rather than a content problem, and only the clock tells them apart.
From your numbers, the coach builds your test strategy: how much to save on the fast parts, how much part 2 can take, and when to drop a question, mark it for review and move on.
The line marks 71s, the budget per question.
The main point, without the crutch of the choices.
Every day, short passages from the bank: you write the central idea in one sentence before seeing the choices, and only then pick one.
Three levels. Move up with 4 right in the last 5, down with 3 misses. At the top level, a 71-second timer, the real test pace.
A score that does not inflate with repeated questions.
40% of the questions are kept only for measurement modules. When you are measured, you have never seen those questions before.
So the trend on your dashboard shows skill, not a remembered answer.
training and practice
measurement only
For spare time, one question at a time.
Filter by domain, skill, difficulty and status. No clock, with the official explanation right after you answer.
Every answer counts toward your progress, and every miss goes to your error book to come back in training.
And what else comes with your account.
AI coach
Ask about grammar, strategy or any question, right in the middle of your session.
focus: Information and Ideas
Reads your score report
Upload your official score report PDF: the coach pulls your score and domains and sets your focus.
Modules just like Bluebook
27 questions in 32 minutes, with Mark for Review and choices you can cross out.
Vocab that is not a cognate
15 words a day, the ones that trick you. They come back until you master them.
Error book
Every mistake with its cause and next step. Before test day, review what actually cost you points.
Daily goal and streak
Vocab, reading and a module close the day's ring. Your streak counts the days in a row.
One pass, until your test day.
Pay once and study until test day. Taking both end-of-year tests? One pass covers both.
November Pass
November + December Pass
Monthly
- Diagnostic from your score report
- Daily session with the AI coach
- Modules, Question Bank and error book
- Your test strategy, part by part
Passes open soon. Leave your email and we will let you know. Charged in Brazilian reais; your bank converts.
Questions
Is this official College Board material?
No. SAT is a registered trademark of the College Board, which is not affiliated with and does not endorse Saturn Prep. The questions come from the College Board's public Question Bank and are shown for personal study only.
Is there Math?
Not yet. Saturn Prep starts with Reading and Writing. Math comes later.
What language is the app in?
Portuguese, English and Spanish: you pick one when you sign up and can switch anytime. The questions themselves are in English, like on the real test.
Do I need to install anything?
No. It runs in the browser. For modules, use a computer, like on test day.
How does early access work?
Leave your email and you are on the list. We open spots in small cohorts; when yours opens, you create your account with the same email.
How much does it cost?
November Pass US$ 15, November + December Pass US$ 25 (covers both tests) and US$ 20 a month for 2027 test takers. Paid by card, charged in Brazilian reais. You can cancel within 7 days for a full refund.
Join the early access list.
Spots open in small cohorts. We will let you know by email.