Digital SAT · Reading & Writing · Math

An AI SAT tutor that explains, then makes you prove it

Most SAT tools hand you a question bank and a score report. PrepGraph works the way a tutor does: it finds the specific question types leaking your points, walks you through a problem step by step when you are stuck — in text or out loud — and then puts a similar question in front of you to check it actually landed. Practice adapts to what you keep getting wrong instead of redrilling what you have already mastered. One subscription covers the SAT, the ACT, AP and K-12, so you are not buying twice while you decide which test to take.

Start free → Score a practice test first

Free plan, free forever. No credit card to start.

How it works

1

Set a target score

Tell PrepGraph the score you are aiming for and when you test. The plan works backward from that number, not from a generic syllabus.

2

Get diagnosed

Practice sets and assessments find the specific question types you miss — inference questions, transitions, systems of equations — rather than the broad section you are "bad at".

3

Work through it with the tutor

When you get stuck, ask the AI tutor. It walks the full solution step by step, in text or out loud with Voice Learning, then hands you a similar question to check that it stuck.

4

Revise on a schedule that adapts

The Mastery Loop resurfaces weak concepts before you forget them and stops drilling what you have already proven. Analytics and score prediction show whether the number is actually moving.

What the AI tutor actually does

Concrete capabilities, not adjectives. Every item below is a shipped feature you can use on the day you sign up.

Diagnoses weak question types, not just weak sections

Knowing you are "bad at Math" is useless. PrepGraph tracks accuracy by question type and concept, so the gap is named precisely enough to fix.

Explains step by step when you are stuck

Ask a question and get a worked walkthrough of the reasoning, not a hint that sends you in circles. Then it checks you can do the next one yourself.

Talk it through out loud

Voice Learning lets you reason through a problem in conversation with the tutor, which is closer to how a human tutor actually works than typing into a chat box.

Adaptive spaced revision

The Mastery Loop schedules a concept to come back at the point you are about to lose it, and retires it once you have shown you own it.

Unlimited exams, quizzes and assessments

Section-timed practice with adaptive difficulty across Reading, Writing and Math. Practice volume is not rationed on the Student plan.

Score prediction and progress tracking

A running estimate of where you stand before test day, plus analytics that show which fixes moved your score and which did not.

Available whenever you study

The tutor answers at 11 p.m. on a Sunday. That is the hour most SAT prep actually happens, and the hour a human tutor is unavailable.

Parent dashboard with weekly reports

Parents see effort and progress without having to interrogate anyone at dinner.

One note on honesty: AI tutor usage runs on a monthly credit allowance, sized generously for daily study and refreshed every month. Exams, quizzes and assessments are genuinely unlimited. We would rather tell you that here than let you discover it later.

The test you are actually preparing for

A lot of SAT advice still describes a test that no longer exists. Here is the Digital SAT as it is scored today.

Section Questions Scored Score range
Reading & Writing 54 50 200–800
Math 44 40 200–800
Total 98 90 400–1600

It is section-adaptive, and that changes your strategy

Each section is delivered in two modules. How you perform on module 1 determines whether module 2 routes you to the harder or the easier set of questions. The practical consequence is that early accuracy carries more weight than it did on the old paper SAT — a shaky first module constrains the rest of the section. So pacing and accuracy on module 1 are worth training on purpose, which is exactly what section-timed adaptive practice is for.

One thing we will not tell you: the exact score ceiling for the lower-difficulty module 2. You will find confident numbers for this all over the internet. College Board has never published one, every figure in circulation is an uncited guess, and we are not going to add another.

Two more things worth internalizing. Of the 98 questions you see, only 90 count — the rest are unscored pretest items being trialed for future tests, and you have no way of telling which. And there is no penalty for a wrong answer, so a blank is strictly worse than a guess. Never leave one.

Want to convert a practice test into a scaled score? Use the free Digital SAT score calculator. No sign-up.

How PrepGraph compares

We are not going to tell you we are the best AI SAT tutor for everyone, because we are not. Here is the honest picture, including where a competitor is the better call.

Tool Best at Approx. price Trade-off
PrepGraph One subscription covering the SAT, the ACT, AP and K-12, with an explain-first tutor and adaptive revision $50/month, or $540/year. Free plan, no credit card AI tutor usage runs on a monthly credit allowance, not an uncapped meter
Khan Academy / Khanmigo The strongest free option, and College Board’s official SAT partner Free; Khanmigo around $4/month Deliberately Socratic — it asks questions back rather than showing a worked solution, which is frustrating when you are stuck and out of ideas
Acely Feature density — a large question bank and a lot of full-length tests Around $49/month billed annually, more month-to-month A credit card is required for the trial. Honestly: Acely is more feature-dense than we are
LearnQ (Mia) Conversational and gamified, with a free tier and a diagnostic Free tier, paid plans above it SAT-led — ACT coverage is limited if you are still deciding between the two tests
UWorld Detailed, illustrated answer explanations — probably the best in the category Around $250 per course A specialist, not a daily tutor. Bought per test
R.test A fast adaptive diagnostic — a score estimate in about 40 minutes Diagnostic-led pricing It diagnoses faster than we do, but it is not a daily study partner

Competitor pricing is approximate and correct to the best of our knowledge as of 2026 — check the current site before you buy. We do not earn a commission on any of these.

Where we think we are the right pick

  • You have not chosen between the SAT and the ACT. One subscription covers both, plus AP and K-12 — so you are not buying twice, or picking a test before you have any evidence about which one suits you.
  • You want to be shown the solution, not quizzed. Socratic tutoring is excellent when you are 80% of the way there and infuriating when you are lost. We explain first, then check.
  • You are priced out of a human tutor. Private SAT tutoring in the US runs roughly $50–150 an hour. One hour costs about what a month of PrepGraph costs. Test-prep courses from the big providers run $300–$3,000 and up.

Where we are not

  • If you need free, use Khan Academy. It is College Board’s official partner and it is hard to beat at $0.
  • If you want the deepest written explanations, UWorld is a strong specialist.
  • If you want the fastest diagnostic, R.test will estimate your score in about 40 minutes. It diagnoses faster than we do.
  • If you want sheer feature density, Acely is more feature-dense than we are.

We wrote the long version of this too: the best AI SAT tutors in 2026, honestly compared. PrepGraph appears in it as one option among several, not as a rigged number one.

Pricing

Stated up front, because in this category that is apparently a differentiator.

Free

$0

Free forever

  • Trial credits at signup — try the voice tutor, the Mastery Loop and step-by-step question help
  • Practice questions & assessments
  • Progress tracking
  • No credit card required
  • When trial credits run out, your account continues on Free with all progress saved

Student

Most popular

$50/month

Or $540/year — about $45/month. USD pricing for US students.

  • Everything in Free, plus:
  • Voice Learning, step-by-step help and Mastery Loop revision
  • Unlimited exams, quizzes & assessments
  • Score prediction and advanced analytics
  • Personalized study plans
  • Parent dashboard with weekly reports
  • Covers the SAT, the ACT, AP & K-12 (Common Core)
  • A generous monthly allowance of AI tutor credits, refreshed every month

Cancel anytime and keep full access through the end of the billing period. Payments handled by Stripe. Schools and districts: contact sales. We do not offer score guarantees — we would rather let outcomes speak.

Start with the free plan

Set a target score, take a diagnostic, and see which question types are costing you points. No credit card, and nothing to cancel if you decide it is not for you.

Start free →

Frequently asked questions

What does an AI SAT tutor actually do?

A good one does three things a question bank cannot. It works out which specific question types you are losing points on, it explains a problem you are stuck on in the way a tutor would — stepping through the reasoning rather than showing the answer key — and it changes what you practice next based on what you just got wrong. PrepGraph does all three, and adds spaced revision so a concept you fixed in March is still there in June.

Will an AI tutor raise my SAT score?

We are not going to give you a number, because we cannot honestly promise one and neither can anyone else. What moves scores is diagnosing the question types you actually miss, understanding why you miss them, and practicing those under time. An AI tutor makes that loop faster and cheaper than it would otherwise be. It does not do the work for you, and we do not offer score guarantees.

Is the AI SAT tutor free?

There is a free plan that is free forever, and it needs no credit card. New accounts get trial credits so you can use Voice Learning, the Mastery Loop and step-by-step question help before paying anything. When those credits run out your account continues on Free with all of your progress saved. The Student plan is $50/month for US users, or $540/year, and you can cancel anytime and keep access through the end of the billing period.

How does the Digital SAT being adaptive change how I should prepare?

The Digital SAT is section-adaptive. Each section arrives in two modules, and how you perform on the first module determines whether the second module you are routed into is the easier or the harder one. The practical consequence is that the first module carries unusual weight — a shaky start narrows the ceiling for the rest of the section. That makes accuracy and pacing on early questions worth training deliberately. Be careful with the specific "score cap" numbers that circulate online for the lower-difficulty module: College Board has never published one, and every figure you will see quoted is somebody’s guess.

How is the Digital SAT scored?

Your total is 400 to 1600, made up of two section scores of 200 to 800 each: Reading and Writing, and Math. Not every question counts. Reading and Writing has 54 questions but only 50 are scored, and Math has 44 questions but only 40 are scored — the rest are unscored pretest items being trialed for future tests, and you cannot tell which ones they are. There is no penalty for a wrong answer, so never leave a question blank. Guess on anything you cannot solve.

How does this compare to Khan Academy?

Khan Academy is the strongest free option on the market and it is College Board’s official SAT partner. If your budget is zero, it is genuinely hard to beat and you should use it. The honest trade-off is its teaching style: Khanmigo is deliberately Socratic and will ask you questions back rather than show you a worked solution, which is exactly what you do not want at 11 p.m. when you are stuck and have run out of ideas. PrepGraph explains first and checks second. Plenty of students use both, and we would rather you picked the right tool than picked ours.

Does PrepGraph replace official Bluebook practice tests?

No, and be suspicious of any AI tool that says it does. Full-length official Digital SAT practice tests live in College Board’s Bluebook app, they use real retired questions, and they are the only place you get an authentic run at the real adaptive engine. Take them there. Use PrepGraph for the part Bluebook does not do: working out why you missed what you missed, and fixing it before the next one.

Does the subscription cover the ACT as well?

Yes. One Student subscription covers the SAT, the ACT, AP and K-12 (Common Core). If you have not settled on the SAT or the ACT yet — and a lot of juniors have not — you are not forced to buy twice or pick before you have evidence.

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