4 Common Mistakes That Can Invalidate Your Duolingo English Test 2026
Avoid the 4 most commonly broken rules on the Duolingo English Test. Learn what causes invalidation and how to keep your DET certified.
Duolingo English Test
How the Duolingo English Test Is Scored: A Complete Guide
Learn how DET scoring works: the 10-160 scale, subscores, score comparisons with IELTS and TOEFL, and what each score band looks like.
Best Platforms to Prepare for the Duolingo English Test (DET) in 2026
We compare the top DET prep platforms for 2026, including Arno, TestReady, Magoosh, BestMyTest, and PrepEx. See which one offers the best free practice, AI scoring, and mock tests.
Expert Tips to Improve Your Listening Score - Duolingo English Test
Learn the best tips to quickly improve your Listening score on the DET.
How Do Arno Credits Work?
One credit gets you scores and feedback on one writing or speaking response.
How to Use Arno to Improve Your Writing Score on the Duolingo English Test
Arno has everything you need to get ready for the DET, and in this article we cover the most useful features to help you with writing.
How Do I Install the Duolingo English Test Mobile App?
You are required to install the official DET mobile app on your secondary device in order to take the DET. Learn how in this article.
How Do I Install the Duolingo English Test Desktop App?
You have to download the DET desktop app from Duolingo directly. This article shows you the exact steps to follow.
If I Purchase a DET Through Arno, Can I Send My Scores to Schools?
Yes. There is no fee to send your Duolingo English Test results to schools, and there is no limit to the number of schools you can send your results to.
How to Take the Duolingo English Test
Learn how to purchase and take your Duolingo English Test.