A notebook that tutors you as you solve.

Your textbook, your handwriting, and a tutor on one page. Zohal checks each step and hints only where you slip.

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A foldable phone opens on a textbook page, and the student circles problem 37 in pen

Physics · Newton’s laws
Problem 37A 4 kg block slides down a 30° ramp with μ = 0.2. Find its acceleration.
  1. ΣF = mg sin θ − μN
  2. N = mg cos θ
  3. ma = mg sin θ − μmg cos θ
  4. a = g sin θ − μ cos θ

Used by students at

  • American University of Sharjah
  • King Saud University
  • University of Fribourg
  • Prince Sultan University
  • Dar Al Uloom University
  • University of Alberta
  • Oregon State University
How it works

Work it out yourself. Zohal watches the steps.

You write each line. Zohal reads along and marks only the first line that doesn’t follow.

01A ball is thrown at 20 m/s, 30° above the ground. How long is it in the air?

02vy = 20 sin 30° = 10 m/s

y = vyt − ½gt²

030 = 10t − 9.8t²04 · HintWhere did the ½ in ½gt² go?

050 = 10t − 9.8t²

0 = 10t − 4.9t²

t = 10 / 4.9 ≈ 2.04 s

06Projectile motion · a skill you’re building4 of 8 problems checked
  1. 01

    Pick a problem

    From the library, or circle one in your own PDF.

  2. 02

    Write it by hand

    Line by line, with a stylus, a pen on iPad, or a mouse.

  3. 03

    The first slip gets marked

    Only the earliest line that doesn’t follow. Everything after it can wait.

  4. 04

    The smallest useful hint

    A question, not the answer. Ask for more only when you need it.

  5. 05

    You fix it

    The correction is yours. The check confirms it.

  6. 06

    Track what you’ve learned

    Every problem you finish counts toward the skill it practiced.

Subjects

Calculus, differential equations, physics, and statistics. More on the way.

Problems from open textbooks, each with a checked answer. Or bring your own PDF.

  • Calculus

    Calculus I to III, from limits to vectors in space

  • Differential equations

    Separable, linear, Bernoulli, and oscillations

  • Physics

    Mechanics, from units to fluids

    New

  • Statistics

    Probability, distributions, and inference

    New
In the notebook

Graphs, animations, and your own PDFs, right next to your work.

30°v₀ = 20 m/speak height?range?
Animated illustrations

See the problem move.

Can’t picture it? Zohal draws an original animation of the exact problem you circled, labeled in your language. It shows the setup and leaves the answer to you.

x ex dxZohal read

Reads your handwriting

Equations, fractions, and matrices, read line by line as you write.

Symbolic check

Checks and plots

Symbolic and numerical checks where they apply, and a graph when a picture helps.

Your problems, or ours

Import a PDF and circle a question, or work through the curated library.

  1. Hint 1
  2. Hint 2
  3. Hint 3
  4. Hint 4
  5. Full solution, only on request

A tutor that asks first

Hints one level at a time. The full solution only when you ask for it.

Ready to work a problem?

Open a question, write it out by hand, and get a hint only where the reasoning slips.

Start practicing

Free to try. No card needed.

Common questions
Will Zohal just solve it for me?

No. It marks the first line that doesn't follow and gives the smallest hint that gets you moving again. The full solution stays hidden unless you ask for it.

Do I have to write by hand?

Yes — that's the point. You work line by line the way you would on paper. Zohal reads those steps, not a typed dump of the answer.

Can I use my own homework or lecture PDF?

Yes. Open a source, mark a problem, and write in a notebook anchored to the page. If you don't have a PDF handy, start from the curated library.

Which subjects can I practice?

Calculus I to III, differential equations, physics mechanics, and statistics, in English and Arabic, with more subjects to follow.

How does it know if a step is right?

When a symbolic or numerical check can support a line, you get a confirmed result. When it can't, Zohal says it's unsure instead of guessing.

What are skill trees?

Pick a goal like robotics, and Zohal shows the math skills it takes and which ones you already have. Each problem you finish counts toward a skill, so Zohal can suggest what to practice next. It’s in early access: set a goal under Learning plan in Settings.

Is there a free way to try it?

Yes. Start on Free with no card, then move to Pro for more Reviews and your own PDFs. See pricing

Does it work in Arabic?

Yes. The notebook, hints, and library work in Arabic and English. Switch language anytime from the header.

Something else on your mind? Write to info@zohal.ai