Overview
The Duolingo English Test (DET) is an affordable, fast, and trusted way to prove your English proficiency for university admissions. Through Cialfo's partnership with Duolingo, students can now buy the test directly via Comet at a special 15% discounted price.
This guide explains how to purchase, pay, and redeem your DET coupon step by step.
Step 1: Submit Your Interest Form
Visit the Comet x Duolingo English test on Comet.
Fill out the DET Inquiry Form to express your interest in purchasing the test.
Once you submit, our team will contact you shortly with the payment link.
Step 2: Complete Your Payment
You'll receive an email from our team with a secure payment link (processed via Stripe).
Click on payment link and it will redirect you to the payment site — fill in the required details and complete the payment.
The test is available at a discounted price of $60 USD (retail price $70 USD).
💡 Note: Your payment is securely processed — no extra fees or hidden charges.
Step 3: Accept Your Test Invitation
After payment, you'll receive an invitation email from Duolingo English Test titled: "Comet has invited you to take the Duolingo English Test!"
Open the email and click on the "Accept Offer" button.
Step 4: Redeem Your Duolingo Coupon
Once you click on "Accept offer" it will take you directly to the Duolingo English Test website where you can proceed to register and take your test.
Click "Sign Up" in the top right corner and create your account.
2. Register using your email and password, then click "Continue".
3. Answer a few questions to personalize your experience
4. On your home page, click "Purchase a Test."
5. Select 1 test (if you're using a coupon).
6. Choose your preferred results delivery time (standard or same-day).
7. In the next screen, input your coupon in the text box under "Subtotal", enter your name and surname, then click "Use Coupon".
8. You'll be redirected to your home page — click "Start Test".
9. Download the Duolingo English Test App and log in using your registered email.
10. Open the app, enter your email and password, then click "Continue". You're now ready to take the Duolingo English Test!
What is new? – Duolingo English Test Landing Page Now Available on Cialfo
In January 2026, a dedicated Duolingo English Test (DET) landing page was launched giving students to learn about the exclusive DET discount available through Cialfo. It has all the necessary information about the 15% DET discount along with a clear path to begin the purchase process.
This makes it easier for students to access and understand the offer without relying on limited external references.
Counselors can now share the link (https://www.cialfo.co/duolingo-english-test-discount) directly with students to help them take advantage of the discount more efficiently.
If you face any issues or haven't received your coupon within 24 hours of payment, please contact us at Support.comet@firstcounselor.ai