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IB Diploma maths · AA and AI · SL and HL

Your handwritten maths, marked line by line.

Write your working on iPad, or photograph it on iPhone. Maths Retriever marks each line IB-style and shows where the mark was lost.

Download on the App StoreHow marking works

Free to start · 5 marked checks and 10 hints a day

A handwritten page marked 6 out of 7 in the Maths Retriever iPad app: a quadratic question with a green tick and its mark code on each correct line — A1 A1, (M1) A1, M1 and A1 — a ticked note on the half-coefficient step, a red cross and A1 on vertex (5, 9) with the reason “Sign error in y-coordinate of vertex”, the correction vertex (5, −9) in red, and the green Check my working button on the page

How marking works

Practise on original IB-style questions, then have your working marked.

  1. Step 1: Write or photograph

    Write on iPad with Apple Pencil or your finger. On iPhone, photograph working on paper.

  2. Step 2: Tap Check my working

    The green button on the page sends it for marking.

  3. Step 3: Read the marks

    A tick or a cross on each line, with a short reason where a mark was lost.

Like any marker, it can occasionally be wrong. The reason is shown beside the line, so you can check it.

The app’s marking sheet for the handwritten page: Feedback 6 out of 7, with every mark listed, earned and lost. Part (a) 2 out of 2: A1 A1 for the factorisation. Part (b) 2 out of 2: (M1) A1 for x = 2 or x = 8. Part (c) 2 out of 3: M1 for completing the square and A1 for the vertex form, then A1 lost on vertex (5, 9) — the correct step is vertex (5, −9), because the y-coordinate of the vertex should be −9, not 9 — a sign error. Then a reminder that a quadratic written as (x − h)² + k has its vertex at (h, k)
The marking sheet for the handwritten page above. Captured from the iPad app.

Take a look inside

Real screens from the app, on iPad and iPhone.

Maths Retriever Home: the weeks until the first maths paper, today’s marks against the daily goal, a 5-day streak, today’s practice, a predicted grade of 6 and tiles for practice, mock exams, review and the mistake log

Today’s goal, your streak and your predicted grade, with every part of the app one tap away.

It marks the working, the way the exam does.

IB maths exams give marks for method as well as the answer. So the app marks your method, line by line.

Your working, not a model answer

The marks go on the lines you wrote, so you see which step lost the mark.

Method marks count

Sound method keeps its method marks when the answer slips — as it would in the exam.

Fits how you revise

Keep your notes and videos. Use this when you want to know if your working would score.

Why it works

Built on how students learn

Each part below is backed by published research.

Sources
  • Barbieri, C. A., Miller-Cotto, D., Clerjuste, S. N., & Chawla, K. (2023). A meta-analysis of the worked examples effect on mathematics performance. Educational Psychology Review, 35, 11. doi.org/10.1007/s10648-023-09745-1
  • Carpenter, S. K., Pan, S. C., & Butler, A. C. (2022). The science of effective learning with spacing and retrieval practice. Nature Reviews Psychology, 1, 496–511. doi.org/10.1038/s44159-022-00089-1
  • Emeny, W. G., Hartwig, M. K., & Rohrer, D. (2021). Spaced mathematics practice improves test scores and reduces overconfidence. Applied Cognitive Psychology, 35, 1082–1089. doi.org/10.1002/acp.3814
  • Metcalfe, J. (2017). Learning from errors. Annual Review of Psychology, 68, 465–489. doi.org/10.1146/annurev-psych-010416-044022
  • Wisniewski, B., Zierer, K., & Hattie, J. (2020). The power of feedback revisited: A meta-analysis of educational feedback research. Frontiers in Psychology, 10, 3087. doi.org/10.3389/fpsyg.2019.03087
  • Yang, C., Luo, L., Vadillo, M. A., Yu, R., & Shanks, D. R. (2021). Testing (quizzing) boosts classroom learning: A systematic and meta-analytic review. Psychological Bulletin, 147(4), 399–435. doi.org/10.1037/bul0000309

All four IB maths courses

Original IB-style questions across the whole syllabus, at three levels: Foundation, Standard and Exam-style.

What else is in it

Hints that read your page

A nudge based on what you have written so far.

Worked solutions

The answer and method for every part. Pro shows every step and how each mark is earned.

Timed mock examsPro

Full IB-style papers under exam conditions, then marked.

Diagnostic testPro

Finds your weak topics across the course.

Mistake log

Mistakes filed by type, so the pattern shows.

Three levels

Foundation, Standard and Exam-style questions across the syllabus.

Predicted grade

A rough guide from your marked work — not an official IB prediction.

My progressPro

A short note on each study day.

No account needed

There is no sign-up, no ads and no tracking across other apps. When you ask for marking, the page image goes to the Maths Retriever service and approved AI providers to be marked. Read the privacy policy.

Before you start

Which devices can I use?

iPad, writing with Apple Pencil or your finger. On iPhone you photograph working on paper.

Does marking need the internet?

Yes. Marking, hints and new questions need an internet connection.

Can the marking be wrong?

Yes. Like any marker, it can occasionally be wrong. The reason is shown beside the line, so you can check it.

How does payment work?

Apple handles payment and shows your exact local price before you confirm.

Do I need an account?

No. There is no sign-up and no account.

More questions? Visit support.

Try it on your own working

Free: 5 marked checks and 10 hints a day. Pro has no daily limit on either, and adds mock exams, the diagnostic and full worked solutions.

Download on the App StoreCompare Free and Pro

iPad with Apple Pencil or your finger · iPhone by photographing paper working