Duolingo
Duolingo English Test Review — Is the $65 DET Worth It in 2026?
The Duolingo English Test is the best-value English proficiency certification — $65, one hour, 48-hour results, accepted by 6,000-plus programs including all Ivy League schools. From 48 analysed opinions: price and convenience are exceptional; score transparency is poor, preparation guidance is minimal, and AI false-flagging affects a minority of test-takers. Strategic advice: if your target institution accepts the DET, use it and save $150-plus versus IELTS. Always verify acceptance at programme level before purchasing.
Final score
from 48 analysed opinions
Published AI-researched, editor-audited
Distribution of opinions
Per-criterion scores
$65 per attempt with unlimited free score sends versus $220-plus for IELTS. 48-hour results and no test-centre booking add further convenience. The primary reason test-takers choose the DET over alternatives.
6,000-plus programs in 110-plus countries accept it, including 98 of the US News Top 100 universities and all Ivy League schools. IELTS is accepted by 12,500-plus organisations — more than double. UK/Australian visa routes and professional bodies don't yet accept at-home tests.
Adaptive difficulty and integrated skill design are genuine strengths. Weakened by the absence of a formal essay (only a 5-minute writing sample), opinion-based speaking prompts, and a perceived lack of academic rigour versus IELTS and TOEFL among experienced practitioners.
No published answer keys, rubrics, or section-level guidance — the weakest methodology dimension. Some test-takers receive a score range spanning three CEFR levels rather than a single number, making preparation harder than for IELTS or TOEFL.
At-home, on-demand testing removes scheduling friction and supports repeated attempts. Three-tier human review provides oversight. Weakened by documented AI false-flag incidents and a 72-hour appeal window that can frustrate test-takers.
What learners said
What people loved
5- $65 per attempt with unlimited free score sends — cheapest cost-per-application of any major English proficiency test×24
- Results delivered within 48 hours versus 13 days for IELTS — critical for tight application deadlines×18
- Taken from home on demand with no test-centre booking, travel, or fixed schedule required×21
- Accepted by 98 of the US News Top 100 universities, all Ivy League schools, and 6,000-plus programs worldwide×16
- Adaptive difficulty system calibrates question complexity to the test-taker's level in real time×11
What frustrated learners
5- Score transparency is poor — some test-takers receive a wide range spanning multiple CEFR levels rather than a single score×14
- No published answer keys or marking rubric for any question type, making targeted preparation genuinely difficult×11
- AI proctoring system has documented false-flag incidents — students flagged for plagiarism or window-switching without clear evidence×9
- Less widely accepted than IELTS globally — 12,500-plus organisations accept IELTS versus roughly 6,000 for the DET×13
- Speaking and writing components are less rigorous than IELTS or TOEFL — no formal essay, speaking prompts are opinion-based rather than academic×10
Real quotes from real users
“It also helped that during Covid, the DET was one of the only online English tests. Many schools started accepting it because people couldn't take the other, in-person ones.”
“Mine was between 110 and 160, which is the equivalent to saying that I am between B2 and C2, and that is a HUGE difference!”
“There is no guidance given about what type of language each type of question is targeting and how answers will be marked, making it difficult to prepare students well.”
“The official practice test provided by Duolingo only gives you one, inaccurate overall score. It does not tell you how you did on each section, nor can you practise individual sections.”
“The speaking component of the DET is quick, which may not provide an adequate assessment of a test-taker's spoken English proficiency.”
“Studying for this test will not arm you with any of the academic skills that you are going to need to succeed at university.”
Frequently asked questions
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How we evaluated this
This review synthesizes 48 opinions collected across the public web. Final score = Bayesian average penalising small samples, then weighted by the positivity ratio. No paid placements, no hidden agenda.
- 8 from Hacker News
- 32 from Blogs
- 8 from Official course platform