Saberi finds out how far your understanding goes and teaches from there, one step at a time. You answer by typing or by hand, and what you learn comes back for review before you forget it.
7 days of Pro free, no card · after that, Pro only: R$49.90 a month7 days of Pro free, no card · after that, Pro only: $9.99 a month7 days of Pro free, no card · after that, Pro only: €9.99 a month
Who it's for
Studying forSAT
Math and Reading and Writing, from the gap behind the wrong answer to test day.
Finds the gap behind the miss
Most missed math questions come down to linear equations, ratios or percentages. The tutor finds which one before explaining the rest.
Work it out by hand
Write your steps on the board and the tutor reads each one, showing where the reasoning slipped.
Review up to test day
What you learned in the spring comes back as a question just before you'd forget it.
Board · your steps
3x − (x − 4) = 10
3x − x − 4 = 10
2x = 14
Tutor
The first step is right. In the second, the minus before the parenthesis flips the sign of the −4 too. What do you get?
How it works
First it listens. Then it teaches.
A tutor that starts by explaining loses both those who already knew and those who didn't know the basics yet. Saberi starts with you.
1
Finds out what you already know
Before explaining, the tutor asks a few quick questions. You mark how sure you are of each answer: a lucky guess doesn't count as knowing.
Multiple choice
If f(x) = sin(x²), what is f′(x)?
Acos(x²)B2x · cos(x²)C2x · sin(x)Confidence 70%
2
Makes a plan with only what's missing
From that, it maps the way to your goal and skips what you've already got. The lesson map shows where you are and what comes next.
Lesson map 40%
FunctionsComposite functionsRate of changeChain ruleDifferentiate sin(x²)Derivative of the inverse
knownnowlearnedto do
3
Teaches one step at a time
Every explanation ends in a question, and the next only comes once the idea has settled. Answer on the board and the tutor reads your work, not just the result.
Think of gears: if g turns 2x times faster than x, and f turns cos(g) times faster than g, the two rates multiply.
Board
That's it. Now try sin(3x² + 1).
Features
For studying, not for chatting.
Say the answer
In the desktop app, coming soon: the text appears as you speak, and the transcription runs on the computer itself, so the audio never leaves it.
because the inner derivative multiplies the outer one and the cosine comes
Study from your PDF
Import your class notes or the textbook. The tutor teaches from them and tells you which page each thing came from.
…the chain rule lets you differentiate composite functions p. 112
Review before you forget
Every idea you learn comes back as a question just before you'd forget it. A few minutes a day, with your streak in sight.
12 days in a row
See what you know
Everything you learn becomes a map of ideas linked to the ones that came before. The color shows what's solid and what needs review; a click takes you back to the explanation.
Practice without rails. Mixed problems, without saying which method to use, with a hint only when you're stuck.
Real formulas. Fractions, integrals and matrices are typeset, like in the textbook.
One search for everything.Ctrl K finds anything you've studied: conversations, ideas and PDF pages.
Compare
Why not just a chat?
An AI chat answers what you ask. Saberi asks first, teaches from what you know and remembers what you've learned. See it next to what you already use.
Compare with
What it does
Saberi
Regular AI chat
Video lessons
Study guides and notes
Starts from what you already know
Yes
Partly if you ask
No the lesson is the same for everyone
No
Makes you answer, not just read or watch
Yes
Partly if you ask
No
Partly exercises at the end
Reads your handwritten work
Yes step by step
Partly from a photo
No
No only the answer key
Teaches from your PDF, citing the page
Yes
Partly if you attach the file
No the material is the course's
Yes it is the material
Reviews what you learned before you forget it
Yes
No
No
No
Shows what you've already mastered
Yes idea map
No
Partly lessons watched
No
Doesn't do your homework for you
Yes
No writes whatever you ask
Yes
Yes
Video lessons for the whole subject
No
No
Yes
No
Price
7 days free · then R$49.90/month7 days free · then $9.99/month7 days free · then €9.99/month
Free to ~R$100/monthFree to ~$20/monthFree to ~€23/month
~R$40 to 90/month~$10 to 40/month~€10 to 40/month
VariesVariesVaries
Saberi has no video lessons and doesn't need to replace your prep course: many people watch the lesson and then study with the tutor. Compared with each one's common use; approximate prices of popular plans in 2026.
Plans
7 days of Pro, free. After that, Pro only.
Every new account tries Pro for 7 days, no card. There's no free plan: after the trial, you need to subscribe to keep studying. If you don't, nothing is charged, and what you studied stays in your account to read and export.
Pro comes to R$1.66 a day, or R$1.23 on the 12-month plan. One hour of private tutoring often costs the whole month.Pro comes to $0.33 a day, or $0.24 on the 12-month plan. One hour of private tutoring often costs the whole month.Pro comes to €0.33 a day, or €0.24 on the 12-month plan. One hour of private tutoring often costs the whole month.
Free trial
R$0$0€0 for 7 days
No card. Once only, it doesn't renew.
Days 1 to 7All of ProThe tutor, the board, your PDFs and Sonnet, as in the paid plan.
Day 8, not subscribedThe trial endsLessons, review and new PDFs stop until you subscribe. What you studied stays in your account, to reread and export.
or R$449 for 12 months with Pix, or in up to 12 installmentsor $89 for 12 months, paid once: 3 months freeor €89 for 12 months, paid once: 3 months free
For studying with the tutor every day, up to the exam.
Lessons with the tutorAbout three long sessions a day
Board and PDFsUnlimited
ModelHaiku and Sonnet, for the hard explanations
ReviewThe tutor asks and corrects your answer
If the month runs outGoes on at a reduced pace, on Haiku
Subscribe in the app, by card or Pix. Cancel whenever you like: what you studied stays yours.Subscribe in the app, by card. Cancel whenever you like: what you studied stays yours.Subscribe in the app, by card. Cancel whenever you like: what you studied stays yours.
FAQ
Before you start.
Which subjects does it work for?
Any subject you learn through explanation and practice: math, physics, chemistry, biology, programming, languages, law, history. Formulas are typeset, like in the textbook.
Does it work for the SAT, AP exams and the MCAT?
Yes. You say what you want to study and what for, and the tutor adjusts the level and the examples. For the MCAT and college, import your prep books, notes or slides as PDFs and study from them. For AP essays, it explains the rubric and comments on your text.
Does it replace my prep course?
It doesn't have to. Saberi has no video lessons: many people watch their prep course's lesson and then study with the tutor, which asks, corrects and makes them review what stuck. Those who study alone use their own PDF material.
Will it do my homework or essay for me?
No. The tutor explains, asks and comments on what you did, but it doesn't hand over solved problem sets or finished essays. That's how what you study stays with you on exam day.
Do I need internet?
Yes. Saberi opens in the browser, and the tutor uses an AI model in the cloud. The desktop app, coming soon, keeps your sessions on the computer itself and takes dictation offline.
Where does my data go?
In the browser, your sessions, PDFs and progress are kept in your account on Saberi's server, and they're removed when you delete the account. For the tutor to answer, the relevant part of the conversation goes to the AI model (Anthropic) only to write the reply.
Why do I need an account?
It's where your plan and the month's tutor use are kept. You sign in with email and password; the email is confirmed once, with a code, when the account is created.
What happens when the trial ends?
Studying stops: there's no free plan. Lessons, review and new PDFs are locked until you subscribe, and nothing is charged, because the trial doesn't ask for a card. What you studied stays in your account: you can reread sessions, see the idea map and export everything. When you subscribe, you pick up where you left off.
Why is there only one trial?
So that the trial can keep existing: each one costs us, and without a limit you could make a new account every week. So it's one per browser or computer. Saberi keeps only an anonymous code for it, never your name or your files.
How do I pay for Pro?
By card, as a monthly subscription you can cancel anytime. Or with Pix: 1 month, or 12 months with 3 months free, which can also be paid in up to 12 card installments. Payments go through AbacatePay.By card, as a monthly subscription you can cancel anytime, or 12 months paid once, with 3 months free.By card, as a monthly subscription you can cancel anytime, or 12 months paid once, with 3 months free.
Where does it work?
In any up-to-date browser (Chrome, Edge, Firefox or Safari), on a computer or a phone. On a phone, the board opens full screen so you can work with your finger. The app for Windows, macOS and Linux is coming soon, with voice dictation running on the computer.
Is it available in English and Spanish?
Yes. The site and the app are in Portuguese, English and Spanish, and the tutor teaches in the language you choose.
Start with what you want to understand.
Open it in your browser, sign in with your email and write your first goal. The first 7 days are Pro.
Saberi