Maths practice for iPad and iPhone

Learn the work, not just the answer.

Write your solution by hand. Roughwork finds the step where it went wrong, asks the question that helps you fix it, and turns the mistake into practice until it holds.

Your working

Solve 3x − (2x − 5) = 4.

1 3x − (2x − 5) = 4

2 3x − 2x − 5 = 4

3 x − 5 = 4

4 x = 9

Line 2. The minus in front of the bracket reaches the 5 too. What is −(−5)?

Illustration of the feedback format: the first wrong step, marked on your own page, and a question instead of the answer.

How it works

Your working tells Roughwork what you need.

An answer key says you got it wrong. It can't say where. Roughwork follows the steps you wrote and starts from the first one that broke.

1Write Work the problem by hand: Apple Pencil on iPad, or paper and a photo on iPhone.

2Check Roughwork reads every line of your working, not just the answer at the bottom.

3Correct It marks the first step that went wrong and asks a question that points at it. You make the fix.

4Practise The mistake turns into a few problems that test the same idea, scheduled until it holds.

See how it works

Hints before answers

Enough help to move. Never the thinking done for you.

When a step goes wrong, Roughwork names what to check, in plain words. The worked solution is there if you ask for it, and the app keeps track of when you did.

→A verdict and the step where it went wrong
→A hint that points, never one that solves
→A tutor to ask about any problem, in your own words

Mastery

Learn it. Recall it. Keep it.

Every skill has four steps, and one honest word for where you are. A skill only moves when your work still holds up after a gap, so when it moves you can trust it.

Not startedYou haven't tried it yet.

With the methodYou can do it with the worked method in front of you.

On your ownYou can do it with no notes and no hints.

In new problemsYou pick the right method in mixed problems.

ProvenYou still had it weeks later, with no warm-up.

Courses

From fractions to eigenvalues.

Nine courses on one ladder, grouped into pathways toward a goal. Start where your maths actually is.

Browse courses

FoundationsRebuild the basics: arithmetic, fractions, percents, ratios, and the first steps of algebra. 3 courses · 21 skills · about 14 weeks Algebra, functions and geometryEquations, graphs, quadratics, exponents and logs through Algebra 2, and the whole of geometry. 4 courses · 39 skills · about 26 weeks CalculusFunctions and precalculus into limits, derivatives and integrals, to AP and first-year university. 4 courses · 27 skills · about 18 weeks Applied mathematics for AIThe maths machine learning runs on: vectors, matrices, eigenvalues and SVD, plus the calculus and probability it uses. 5 courses · 16 skills · about 11 weeks

GRE and GMAT

Your scratch work is where the lost points start.Find the step, not just the answer. One price until your test date.For test prep ›

Learning

Rebuilding your maths, one skill at a time.A plan for your weeks, lessons, and practice that remembers what you missed.See the courses ›

From the blog

All posts ›

Guide How to stop making sign errors on GMAT and GRE quant A sign error is a dropped or flipped negative. Two habits catch most of them: write the sign before the number, and plug your answer back in. 14 September 2026 · 9 min read Guide How to stop losing GMAT and GRE points to careless mistakes Make your work visible, check every step against a fixed routine, and keep an error log. The specific check for each kind of slip. 8 September 2026 · 12 min read

Make the mistake once.

Then fix it yourself, and practise it until it holds.