SAT OS

SAT OS is an independent SAT preparation platform.

SAT prep that tells you what to study next.

Know exactly where you're losing SAT points — and what to do next.

Take a diagnostic. SAT OS is built to show your accuracy by domain (the SAT's topic groups), then point you to the next skill to practice, with the reason attached.

Take the DiagnosticSee how it works

Sign-up is by invitation for now.

Swipe the example console.

Diagnostic / Weakness mapExample data

Example accuracy

Algebra33%
3 answersFocus area
Craft and Structure60%
5 answersBuilding
Standard English Conventions80%
5 answersStrong

Example answers are shown under each domain

Recommendation / Next practiceExample data

Algebra

Linear equations in one variable

About 8 questions · one skill

Capability concept. The reason stays attached to the evidence.

Accuracy by domain. Not an official SAT score and not an SAT-equivalent score.

How it works

Three steps: find where points are going, practice that, then check again.

  1. 1

    Take the diagnostic

    A diagnostic performance check across the 8 SAT domains, built to show where your points are going.

    Example data
    4
    Reading & Writing domains
    4
    Math domains
  2. 2

    See where points are going

    Results show accuracy by domain and how many answers each one rests on. It is a performance check, not an official SAT score.

    Example data
    Algebra33%
    3 answersFocus area
    Standard English Conventions80%
    5 answersStrong
  3. 3

    Practice, then check again

    SAT OS points you to the next skill to practice and shows the reason. A later reassessment shows whether accuracy moved.

    Example data
    Focus areaAlgebra

    Linear equations in one variable

    • 1incorrect
    • 2incorrect
    • 3correct

Here's what your results look like

The SAT groups its questions into 8 domains: four in Reading & Writing and four in Math. SAT OS reports your accuracy for each one. This is a layout preview with example numbers for one made-up student.

Results / Weakness mapExample student, Diagnostic 1

This is a diagnostic performance check, not an official SAT score and not an SAT-equivalent score. It shows performance by domain so you know what to practice.

Information and Ideas50%
4 answersFocus area
Craft and Structure60%
5 answersBuilding
Expression of Ideas67%
3 answersBuilding
Standard English Conventions80%
5 answersStrong
Algebra33%
3 answersFocus area
Advanced Math50%
4 answersFocus area
Problem-Solving and Data Analysis75%
4 answersStrong
Geometry and Trigonometry75%
4 answersStrong
  • Focus area (under 55%)Where points are going. Practice starts here.
  • Building (55–74%)Partly there. Worth some practice.
  • Strong (75% and up)Solid on this sample. Less urgent.
Is this my SAT score? This is a diagnostic performance check, not an official SAT score and not an SAT-equivalent score. It shows performance by domain so you know what to practice.

What a practice session looks like

After the diagnostic, SAT OS points to a skill and shows why. Then you practice that skill. This is example UI. Practice sets in this version are not scored, and this page does not score answers.

1. SAT OS points to a skill
Recommendation / Next practiceExample recommendation
Focus areaAlgebra

Linear equations in one variable

About 8 questions · one skill

Example evidence

  • 1incorrect
  • 2incorrect
  • 3correct

In this illustration, one of three Algebra answers on the skill is shown as correct and two are shown as missed. The priority is explainable from that sample.

2. You practice that skill
Targeted set / PracticeExample practice
AlgebraLinear equations in one variable

A line passes through the points (0, 2) and (4, 10). Which expression gives the slope of that line?

  • A(10 - 2) / (4 - 0)
  • B(4 - 0) / (10 - 2)Illustrated selection
  • C10 - 2
  • D4 + 0

Highlighted to show the control. Not a graded answer.

Example explanation

Example UI. Practice sets in this version are not scored. This page does not score answers.

Why not just use a question bank?

A question bank gives you questions. SAT OS is built to tell you which ones to do next, and why.

A question bank

  • Gives you questions
  • You choose what to practice
  • You judge for yourself whether it is working

SAT OS

  • Starts with a diagnostic
  • Shows accuracy by domain, with the answer count behind it
  • Points to the next skill and shows why
  • A reassessment shows whether accuracy moved

For parents: see the signal, not just a number.

A parent-friendly summary would show the focus area, the reason for the next practice, and whether accuracy is moving. This is a concept preview: parent accounts and summaries are not part of SAT OS today. A result here is not an official SAT score.

See how it works
Parent view / This weekExample student
Focus area
Algebra (example)
Next practice
Linear equations · 8 questions
Accuracy movement
Example only — not a guaranteed gain and not a percentile.

This is a diagnostic performance check, not an official SAT score and not an SAT-equivalent score. It shows performance by domain so you know what to practice.

Questions

The short answers.

What is SAT OS?

SAT OS is an independent SAT preparation platform. You take a diagnostic, see your accuracy by domain, get a next practice skill with the reason attached, practice it, and later reassess to see whether accuracy moved.

Is the diagnostic the real SAT? Will I get an SAT score?

No. This is a diagnostic performance check, not an official SAT score and not an SAT-equivalent score. It shows performance by domain so you know what to practice. SAT OS is not affiliated with or endorsed by the College Board.

What is a domain?

The SAT groups its questions into 8 domains: four in Reading & Writing and four in Math. SAT OS reports your accuracy for each one.

Can I sign up today?

The Take the Diagnostic button goes to sign-up. Sign-up is by invitation for now: you enter the email address you were invited with, and a sign-in link arrives by email.

Does AI decide whether my answers are right?

No. Scoring is deterministic software. The same answers are designed to produce the same result, and no model decides whether you were right.

Why does it recommend a skill?

Each recommendation is designed to show the evidence behind it, such as the answers that pointed to that skill, so you can see why it was chosen.

What does SAT OS not claim?

No guaranteed score gains, no percentile, and no prediction of your SAT score. Early development uses controlled content, and we do not claim a production-validated bank today.

  1. Diagnose
  2. Understand
  3. Practice
  4. Measure
  5. Reassess

Stop wondering what to study next.

Start with a diagnostic.

Sign-up is by invitation for now.

Take the Diagnostic

SAT OS is an independent SAT preparation platform.