Mathematics
0580The gate everything else waits behind.
- Questions
- 1,000
- Criteria
- 2,775
Papers 2, 4 · growing weekly
Cambridge IGCSE · marking, not tutoring
You got 62.
Here are the 38.
Submit your exam attempt. Get back every mark you lost and exactly why. Phloem marks your working the way an examiner does — one criterion at a time — not one score for the whole answer.
Seven days free. Plans from $5 a week after. Cancel any week.
- Cambridge IGCSE
- Mathematics 0580
- Physics 0625
- Chemistry 0620
- Biology 0610
- Computer Science 0478
- English as a Second Language 0510
- 14,801 markable criteria
- 6,000 questions
- M · A · B marks
- Follow-through marking
- Subjects
- 6Subjects
- Questions written
- 6,000Questions written
- Markable criteria
- 14,801Markable criteria
- Criterion types
- M·A·BCriterion types
The problem
Your practice paper comes back 64%. But which 36% did you lose?
A percentage is a verdict, not a diagnosis. It tells you that something went wrong thirty-six times and refuses to say what.
Every other tool marks your answer right or wrong. You get a tick, a cross, and a number — and none of it tells you whether you lost the mark because you misread the question, because you picked the wrong method, or because you divided 24 by 8 and wrote 4.
Those are three completely different problems. Two of them you fix in an afternoon. One of them you have been repeating since Year 9 and nobody has ever named it.
Phloem shows you the individual marks you dropped and the exact criterion each one failed — because that is the unit a real examiner works in.
Every other app
64%Try again — keep practising!
Phloem
- M1Cosine rule substitutionsign error on −2ab cos C
- A1Reverse percentageapplied % to the new price
- B1Similar solids, volumeused the length scale factor
…and every other mark, each named and tied to the mistake behind it.
The engine
Marking is a
procedure, not
an opinion.
A mark scheme is a sequence of independent decisions. Did the candidate choose a valid method? Did they carry it out? Is the value they produced correct, judged against the value they themselves arrived at earlier? Each of those is a separate question with a separate mark attached.
Phloem answers them one at a time, in the order the specification sets out, and records which criterion produced each mark. That is why it can tell you that you lost one accuracy mark and kept two method marks — instead of telling you that you got a question wrong.
No chat window, no open-ended tutoring, no score with a motivational message attached. A marker, and the reasoning it used.
How it works
Three steps, and the middle one is the whole product.
- 01
Upload your attempt
Photograph your working or type it in. Whole question, workings and all — not just the final answer, because the working is where the marks actually are.
- 02
It marks criterion by criterion
Phloem walks the mark scheme one criterion at a time, deciding each mark on its own evidence. Method marks are judged separately from accuracy marks.
- 03
See exactly where your marks went
Every mark you earned, every mark you dropped, and the named mistake behind each one — plus another question on the criterion you failed.
Watch it mark
One arithmetic slip. Most apps say zero. An examiner says two.
This student got the final answer wrong. Their method was right the whole way through, so the method marks are theirs. Here is the same script, marked the way the exam board marks it.
Mathematics 0580 · Paper 4
Solve the simultaneous equations.
6x + 2y = 28 · 2x − 2y = −4
0 / 4
marks
- M1
M1
Adds the two equations to eliminate y
6x + 2y = 28 2x − 2y = −4 —————— 8x = 24
- A1
A1
Obtains x = 3
8x = 24 x = 4
- M2
M2FT
Substitutes their x into either equation
6(4) + 2y = 28 24 + 2y = 28 2y = 4
- A2
A2
Obtains y = 5
2y = 4 y = 2
Marking one criterion at a time…
Method marks are separate
An M mark pays for choosing and carrying out the right method. It does not care whether the number that came out was right.
Follow-through is judged on their answer
Once the slip happens, later criteria are marked against the student's own earlier value — so one mistake costs one mark, not four.
This is just how boards mark
None of this is generous. It is the published behaviour of a Cambridge mark scheme, applied consistently. No other AI tool does it.
Skeptical? Fair enough.
Don’t take our word for it.
Send one question you got wrong. Phloem marks it criterion by criterion and shows you every mark you dropped, and the mistake behind it. No account, no card, no trial to remember to cancel.
No signup required
On purpose
What makes this different.
Criterion marking
Each mark is decided on its own evidence, in the order the mark scheme sets out. You see the criterion, not a colour.
Follow-through marking
Slip early and the rest of your working is judged against your own answer. One mistake costs one mark, not the whole question.
Mark-scheme aligned
M, A and B marks behave the way the published specification says they behave — including which marks depend on which.
Instant feedback
Marked in seconds, with the misconception behind each lost mark named and another question on that criterion ready to go.
A plan that decays
Topics you stop practising fade, the way they actually do. Phloem resurfaces them before the exam, not after.
No streaks, no badges
No XP, no daily flame. You have an exam date — that's the motivation. Streaks just push people to redo easy topics.
Student plans
Start free. Pay weekly after.
Every plan starts with a seven-day free trial. Pick the tier that fits how hard you're going, and cancel any week.
Premium
One subject, marked properly.
$5/ week
After the 7-day free trial
- Criterion-by-criterion marking
- Mistake explanations
- Study plan that decays
- One subject
Luxury
Most pickedEverything you're sitting.
$8/ week
After the 7-day free trial
- Everything in Premium
- All subjects unlocked
- Photo marking
- Unlimited questions per day
Top-tier
For the last eight weeks.
$15/ week
After the 7-day free trial
- Everything in Luxury
- Priority marking queue
- Cross-paper pattern analysis
- Exam strategy insights
All plans are weekly. Cancel any time — no contracts, no minimum term. Your card is only charged on day eight.
Questions
The ones you're actually asking.
Who built this
Built by a student,
for students.
Hi, I’m Alaa Abbadi.
I built Phloem on my own, because every revision app I tried told me what my score was and none of them told me what I had actually done wrong. A percentage is not feedback. The criterion you dropped, and the reason you dropped it, is.
So Phloem marks the way the people marking your real paper do — one criterion at a time, method marks judged separately from accuracy marks, follow-through applied against your own working. No streaks, no XP, no chatbot. You have an exam date; that is motivation enough.
Phloem marks against published Cambridge specification criteria and is not affiliated with or endorsed by Cambridge Assessment International Education. Every question was written for Phloem — no past paper or published mark scheme has been reproduced.
Find out what the 38 were.
Upload one question you got wrong. Phloem marks it criterion by criterion and names every mark you dropped. Seven days free, then $5 a week if you keep it.
No card for the trial. No contracts. Cancel any week.