DETPractice

DETPractice is a preparation service for the Duolingo English Test, aimed at learners who want drills, lessons and automated feedback in one study routine. Its broad practice offering and web and mobile access make it a practical fit for focused DET preparation, though paid-plan value depends on how many mock tests and AI corrections you need.

Overview

DETPractice concentrates on a single exam. Its bank has more than 18,000 questions, and the service says content is updated every day. Adaptive full-length mock tests provide estimated scores in 1–5 minutes, while AI scoring and correction cover speaking and writing. That combination offers a useful way to structure practice, but estimated scores and automated corrections are not official assessments; the practice questions and mock tests do not replace the Duolingo English Test.

Courses, lessons, guides and other learning materials complement the question bank. The AI tutor can answer DET questions, check grammar, translate or rewrite text, and generate practice content. DETPractice describes itself as a Platinum Partner for Duolingo English Test preparation.

Key features

Practice and feedback

The free tier includes all question types, 300+ practice questions, basic explanations and limited access to some features. It is enough to sample the range of practice, but its question cap and limited evaluations make it a constrained choice for sustained study. Score tracking and a study plan can help learners organize practice and monitor progress, while speaking and writing feedback addresses two response types directly.

Study across devices

DETPractice runs on the web, iOS and Android. The same account can be used in a browser, with supported learning history carried across; that is useful for learners who switch between a computer and phone or tablet. Online customer service is available Monday–Friday from 10:00 to 19:00, with email responses within one business day. Stripe processes payment information, which is stored by Stripe.

Pricing

The freemium structure gives learners a free starting point and three monthly paid tiers. All paid prices below are billed monthly.

Basic is the least expensive paid route to the full question bank and ten monthly corrections, but it does not include a stated mock-test allowance. Plus adds three tests and substantially more corrections for learners who want both. Pro is aimed at intensive practice: it raises the test allowance to ten per month and removes the AI-correction quota. Mock-test access expires after 90 days, so a subscription is a poor fit for anyone expecting to keep using tests beyond that window.

Platforms

Use DETPractice in a browser or through its iOS and Android apps. The same account supports access across web and mobile, with supported learning history.

Who it's for

DETPractice suits people preparing specifically for the Duolingo English Test who want a substantial question bank, structured learning materials, mock tests and automated speaking and writing feedback together. The free tier works for an initial trial; Basic suits question-led practice, while Plus and Pro make more sense as mock-test frequency and correction needs increase. Learners seeking preparation for another exam, or official scoring rather than practice estimates and AI feedback, should look elsewhere.

Pros and cons

Pros

• More than 18,000 questions, with content the service says is updated daily, support repeated practice.
• Adaptive full-length mocks return estimated scores in 1–5 minutes, providing a quick checkpoint during preparation.
• Courses, guides, an AI tutor, score tracking and a study plan broaden the offering beyond question drills.
• Web, iOS and Android access with supported learning history helps accommodate study across devices.

Cons

• The free plan is capped at 300+ questions and limits evaluations, so it is not a full substitute for a paid study routine.
• Basic has no stated mock-test allowance, leaving learners who want regular full-length tests to consider a higher-priced tier.
• Mock-test access expires after 90 days, limiting how long those tests remain usable.
• Mock scores are estimates, and AI corrections are practice feedback rather than the official test result.

Alternatives

For a broader set of exam-prep options, browse Language Test Prep Apps.

• Choose Cambridge Play for its free daily gift and staged Writing and Speaking access, rather than DET-focused preparation.
• AlfaPTE is another freemium test-prep option, with 20,000 practice questions, limited AI scoring, one full mock and one sectional mock in its free plan.
• Celpip AI offers three scored sessions for the life of the device and free Reading and Listening practice, for learners preparing for CELPIP.
• PTE Tutorials is an alternative for PTE learners; its free plan includes practice questions, model answers and mobile app access.
• TOEFLMock gives TOEFL learners the first full test and first test in each section free, with no card required.
• CELPIP Test Prep is a web-based CELPIP option whose free tier includes a question bank, templates, mocks and a five-minute diagnostic.
• E2Language is another test-preparation service, with a full course and live classes in its Express package.
• IELTS by IDP App fits IELTS learners who want preparation articles, videos, webinars, podcasts, quizzes and flashcards in a mobile app.

Verdict

DETPractice is a strong choice for learners preparing specifically for the Duolingo English Test who want a deep question bank, study materials and AI feedback alongside adaptive mock tests. Start free if you are still evaluating the format; choose Basic for question-led practice, Plus for a moderate monthly mix of mocks and corrections, and Pro only if you will use its larger allowances. Look elsewhere if you need another exam’s preparation or expect mock tests to stand in for the official test.