What is the Duolingo English Test?
The Duolingo English Test (DET) is an online English proficiency exam that you take from home on your own computer, using a webcam and a microphone. Instead of booking a seat at a test centre months in advance, you register online, sit the exam whenever you are ready, and usually receive certified results within a few days. Thousands of universities and institutions around the world now accept it alongside TOEFL and IELTS, though acceptance varies by programme — always confirm with the institution you are applying to, and check the official Duolingo English Test website for current details on fees and policies.
For test-takers in Iran and Afghanistan, the DET has become disproportionately popular for very practical reasons. It costs considerably less than TOEFL or IELTS, there is no need to travel to a test centre, and registration and payment happen entirely online. When test-centre access is limited, distant or expensive, an at-home exam that produces widely accepted results is a genuine lifeline. If you are still deciding which exam fits your goals, our comparison of TOEFL vs IELTS vs DET walks through the trade-offs in detail.
The adaptive, at-home format
The DET is computer-adaptive: the difficulty of each question adjusts to how you answered the previous ones. Answer well and the questions get harder; struggle and they ease off. This is why the exam is short — roughly an hour of graded questions plus an ungraded video interview and writing sample — yet it still measures a wide range of levels. It also means no two test sessions are identical, so memorising specific questions is pointless. The skills themselves are what get tested.
Because you take it at home, the exam is proctored through your camera and screen recording, with strict rules: you must be alone in a quiet room, keep your eyes on the screen, and avoid headphones, notes and second devices. Rule violations can invalidate a result, so practising under realistic conditions matters as much as practising the English itself. ScoreProMax's timed Exam Mode exists exactly for this — full-length, clocked simulation so that the format holds no surprises on test day.
How the 10–160 score scale works
DET scores fall on a scale of 10 to 160, reported in increments of 5. Alongside the overall score you receive subscores — Literacy, Comprehension, Conversation and Production — which combine your performance across reading, listening, speaking and writing tasks rather than mapping one-to-one onto four separate sections. Many competitive universities ask for something roughly in the 100–130 range, but requirements vary widely by programme, so check each institution's admissions page and the official DET website for current thresholds.
Because the scale is unfamiliar, many learners find it hard to judge where they currently stand or how fast they are improving. ScoreProMax's Score Predictor helps with exactly that: it builds a deterministic projection from your accumulated practice results — an evolving estimate that is clearly labelled as an estimate, never an official score, and never a guarantee.
The task types you will meet
Rather than a few long sections, the DET mixes many short task types. ScoreProMax's DET practice pool — 26,779 questions built across the exam's task types — covers the formats you will actually meet: C-test paragraphs where you complete the missing halves of words; read-and-select items where you judge whether words are real English; fill-in-the-blanks; dictation, where you type a sentence you hear; read-aloud speaking; picture description in both written and spoken form; short read-then-write and interactive writing prompts; interactive reading passages with embedded questions; interactive listening conversations; and interactive speaking tasks. The exam also ends with longer open speaking and writing samples that are sent to institutions along with your score report.
This variety is the real difficulty of the DET: you switch in seconds from typing a dictated sentence to describing a picture aloud. The sensible route is to practise each task type separately first, then mix them under time pressure — and that is exactly how the platform's practice library is organised. You can see the real interface for yourself in the free read-only demos without creating an account.
How to prepare honestly
Begin with one full mock under timed conditions to find your honest baseline — not the score you hope for, but the one you actually produce today. From there, drill your weakest task types in untimed Practice Mode, where you can think, review and repeat, then return to timed mocks until the pace feels automatic. ScoreProMax offers 50 full DET mocks assembled from its 26,779-question pool, with AI practice feedback on the production tasks — feedback that is clearly labelled as practice guidance, never an official score.
Two habits matter more than any trick. First, type and speak under time pressure every day, because the DET rewards fluent, fast production more than slow perfection. Second, simulate the real setting: a quiet room, camera-facing posture, no pausing to look things up. The interface is available in English and Persian, pricing is regional (AFN for Afghanistan, toman for Iran) with manual activation after payment confirmation, and parents can follow progress through a privacy-safe view. Try the demos first, then get access when you are ready to commit to a study routine.