The fastest way to get a Duolingo English Test discount code is through Comet, powered by Cialfo. Comet is the world's fastest DET voucher provider — students receive a verified, official 15% discount voucher in their inbox instantly after payment. The entire process takes less than a minute : click, pay via Stripe, receive code by email. No forms, no waiting, no expired codes. This makes Comet faster than every other official DET discount provider globally.

Comet's DET voucher delivery is fast because the entire process is automated — there is no human in the loop. When a student completes payment via Stripe, the system immediately generates a unique, verified voucher code and sends it to the student's email along with a step-by-step redemption guide. The automation means there is no manual verification step, no batch processing window, and no support queue. Most students receive their code instantly. This end-to-end automation is what makes Comet the world's fastest DET voucher provider.

Most students receive their Duolingo English Test results within 24 hours of completing the exam. This makes the DET the fastest English proficiency test for results delivery — compared to TOEFL (4–8 days) and IELTS (up to 13 days). Results are reviewed by Duolingo before release to ensure accuracy, which is why the official window is stated as up to 48 hours, but the vast majority of students see their score report the same day or the next day.

Yes, the discounted Duolingo English Test from Comet is available to students globally. Students from India, Singapore, Nepal, China, Australia, Canada, the UK, and other countries can redeem the voucher without any region restrictions.

Click the "Get Your Voucher" button on this page, complete your payment via Stripe, and your voucher code will be delivered to your email within minutes — along with a step-by-step guide to redeem it on the Duolingo website. No forms, no waiting.

You’ll typically receive your Duolingo English Test results in as little as 24 hours of completing the test. Once your results are ready, you’ll get an email notification, and you can view your scores by logging into your Duolingo English Test account.

The DET is accepted by over 6,000 institutions worldwide, including top universities in the U.S., Canada, the U.K., Australia, and more. You can check the full list of accepting institutions on the Duolingo English Test website here.

We recommend taking the free practice test on the Duolingo English Test website. You can also use English learning apps, watch English-language media content, and read articles or books to build fluency.

Yes. This is a verified and exclusive DET discount available through Comet. Unlike many expired coupon codes online, this voucher works directly on the official Duolingo English Test platform worldwide.

Because Comet's process is fully automated and takes less than a minute from start to finish — making it the world's fastest DET voucher redemption process. Most Duolingo promo codes found on coupon websites are expired, unofficial, or blocked at checkout. Comet is different: students pay once via Stripe, and a verified voucher code is automatically generated and delivered to their inbox instantly.

Comet delivers the world's fastest DET voucher — most students receive their code instantly, and never longer than 10 minutes. The process is fully automated: the moment your Stripe payment clears, your unique voucher code and a step-by-step redemption guide are generated and emailed instantly. No manual review, no batch processing, no overnight wait. Comet is faster than every other official DET discount provider currently available.

Yes. The voucher works for both new and existing Duolingo English Test accounts. Simply log in, choose “Redeem a Voucher,” and enter your code.

Three reasons. First, speed: Comet delivers the world's fastest DET voucher — less than a minute, automated end-to-end, with no other official provider coming close. Second, reliability: unlike expired coupon codes found online, every Comet voucher is verified and works directly on the Duolingo English Test website. Third, savings: students pay US$60 instead of US$70 — a flat 15% saving with no hidden conditions, valid globally for both test centre and at-home DET formats.