7 Best Duolingo English Test Practice Platforms Compared: F…

The Duolingo English Test (DET) packs reading, listening, speaking, and writing into roughly 60 minutes and returns a single adaptive score on a 10–160 scale. That speed is exactly why it’s hard to prepare for: the test adapts to your level in real time, so a fixed set of flashcards tells you almost nothing about the score you’d actually get on test day. The right Duolingo English Test practice platform closes that gap by simulating the adaptive format, scoring your speaking and writing the way the real test does, and showing you where 10 more points are hiding before you pay the exam fee.

Below we compare seven of the platforms students reach for when they search for serious DET practice in 2026 — what each does well, where it falls short, and who it’s genuinely the best fit for. We’ve put PrepareBuddy first because of its test coverage and AI feedback depth, but we name the honest reasons you might pick another option too.

What makes a Duolingo English Test practice platform actually useful

Before the list, here’s the short version of what separates a real DET prep platform from a vocabulary app:

• Adaptive simulation — the DET adjusts difficulty question by question. Practice that mimics that behaviour predicts your real score far better than fixed-difficulty drills.
• AI scoring on speaking and writing — the DET’s integrated and standalone tasks (Write About a Photo, Speak About a Photo, Interactive Writing) are where most points are won or lost. You need feedback, not just a recording.
• Full-skill coverage — Literacy, Comprehension, Conversation, and Production subscores each move your total. A platform that only drills reading leaves money on the table.
• A real diagnostic — you should be able to see an estimated band before you spend on the official test.

The 7 best Duolingo English Test practice platforms in 2026

1. PrepareBuddy — best for AI feedback and multi-test coverage

PrepareBuddy treats the DET as a full adaptive exam, not a quiz. Its content is generated by a 120B-parameter AI model calibrated to feel indistinguishable from official material, and speaking responses are evaluated by Voice AI that scores pronunciation across 30+ English accents, analyses fluency, and reads 48 distinct emotions to coach delivery — not just transcription. Writing is graded against real rubrics with multi-model verification, delivering 95% AI scoring accuracy.

The bigger differentiator: students rarely sit only the DET. PrepareBuddy covers 11+ test types — IELTS, TOEFL, PTE, OET, CELPIP, GRE, GMAT, SAT and more — so the same account that preps your DET also backs up your IELTS or PTE plan B. You can take a free diagnostic to see an estimated score first.

Best for: students who want exam-accurate AI feedback on speaking and writing, or who may sit more than one English test. Trade-off: it’s a full platform, so it’s more than you need if you only want a single timed mock.

2. DET Ready (Duolingo’s official practice)

Duolingo’s own free practice test is the most authentic preview of the interface and question styles because it comes from the test maker itself. Every serious candidate should take it at least once. The limitation is feedback: it gives you a rough practice score but little granular coaching on why your speaking or writing lost points, and the number of full practice attempts is limited.

Best for: getting familiar with the official interface. Trade-off: minimal diagnostic depth or improvement guidance.

3. TestGlider

TestGlider is well known among DET candidates for timed mock tests with automated scoring and a clean results breakdown. It’s a solid, focused option if your main need is repeated full-length simulation.

Best for: students who want repeated DET-style mocks. Trade-off: narrower test coverage and lighter speaking-feedback depth than a full AI platform.

4. LingoLeap

LingoLeap is an AI-focused DET prep tool that offers practice questions with automated scoring and study guidance aimed specifically at the Duolingo format. It’s a reasonable choice for self-paced learners who want AI estimates on individual question types.

Best for: self-paced, DET-only learners. Trade-off: single-test focus means no fallback if you switch to IELTS or PTE.

5. Prepkit (DET Prep)

Prepkit’s DET preparation provides question banks and practice tasks organised by the test’s skill areas. It works as a drilling resource to build familiarity with question formats.

Best for: question-bank-style repetition. Trade-off: drilling-first rather than full adaptive simulation.

6. Arno (GoArno)

Arno started in the TOEFL space and has expanded its AI practice approach to other tests, offering automated practice and scoring. If you’re juggling TOEFL and DET, it can keep both in one place.

Best for: TOEFL-plus-DET candidates. Trade-off: DET coverage is newer than its TOEFL core.

7. Magoosh (note: no dedicated DET module)

Magoosh is a strong, well-reviewed brand for IELTS, TOEFL, GRE, GMAT and SAT, with structured video lessons and a large question bank. We include it because many students search “Magoosh Duolingo” — but in fairness, Magoosh does not offer a dedicated Duolingo English Test course. If the DET is your target, you’ll need a DET-specific platform instead.

Best for: students prepping IELTS/TOEFL/GRE alongside — not DET. Trade-off: no DET-specific practice.

Comparison matrix: DET practice platforms at a glance

Matrix reflects each platform’s general positioning; always confirm current features on the provider’s own site, as offerings change.

How to choose the right one for you

Match the platform to your situation rather than chasing the longest feature list:

• You only need to feel the real interface once: start with DET Ready, then move to a platform with real feedback.
• You want repeated timed mocks: TestGlider or Prepkit will give you reps.
• You’re weak on speaking or writing: choose a platform with genuine AI feedback — this is where PrepareBuddy’s Voice AI and rubric-based writing scoring pull ahead, because they tell you what to fix, not just your score.
• You might also sit IELTS or PTE: a multi-test platform avoids paying for two subscriptions. PrepareBuddy’s adaptive engine spans 11+ tests under one account.

For coaching centres and consultants offering DET prep

If you run a coaching centre or study-abroad consultancy, the calculus is different: you need to offer DET practice to students, not just take it. PrepareBuddy is available as a 100% white-label platform — your domain, your logo, your branded emails, zero PrepareBuddy branding — deployable in 24–48 hours with no lock-in contracts. That lets you add Duolingo, IELTS, PTE and more under your own brand without building any technology. Over 200+ institutions and 50,000+ students already use the platform, which reports a 95% satisfaction rate. Talk to the team via a quick demo to see the institute dashboard.

Frequently asked questions

What is the best Duolingo English Test practice platform in 2026?

It depends on your goal. For authentic interface familiarity, Duolingo’s official DET Ready is the starting point. For exam-accurate AI feedback on speaking and writing — and if you may also sit IELTS, TOEFL or PTE — PrepareBuddy offers the deepest coverage, with Voice AI speaking analysis and 95% AI scoring accuracy across 11+ tests.

Can I practise the Duolingo English Test for free?

Yes. Duolingo provides a free official practice test, and PrepareBuddy offers a free practice test and a free diagnostic that estimates your score before you pay for the real exam, with the first month free and no credit card required.

Does Magoosh have a Duolingo English Test course?

No. Magoosh is well known for IELTS, TOEFL, GRE, GMAT and SAT, but it does not offer a dedicated Duolingo English Test module. If the DET is your target test, use a DET-specific platform such as PrepareBuddy, DET Ready, TestGlider or LingoLeap.

How accurate are AI practice scores compared to the real DET?

Accuracy varies by platform. Tools built on smaller models give rougher estimates, while PrepareBuddy uses a 120B-parameter model with multi-model verification to reach 95% scoring accuracy and align closely with how the real adaptive test grades integrated and standalone tasks. No practice score is a guarantee, but accurate AI feedback narrows the gap.

Start practising with accurate AI feedback

The fastest way to find your real Duolingo English Test level is to take a scored practice run and see exactly where your points are leaking. Try a free practice test on PrepareBuddy — or sign up to start your DET prep with the first month free, no credit card required.