One platform · Five tests

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Which English test are you preparing for?

Choose TOEFL 2026, IELTS, PTE, CELPIP, or the Duolingo English Test. Practice current task types, get PrepEx score estimates, and receive speaking and writing feedback in seconds.

TOEFL IELTS PTE CELPIP DET

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5 tests

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English test preparation for every goal

Choose your test to open a dedicated practice hub built around its current format.

TOEFL

Prepare for the 2026 TOEFL with adaptive Reading and Listening practice, scored Speaking and Writing on the 1–6 scale, full mock tests, and a study plan shaped by your results.

Start TOEFL prep →

IELTS

Practice all four IELTS skills with realistic tasks, full mock tests, band-aligned score estimates, and clear feedback on your Speaking and Writing.

Start IELTS prep →

PrepEx PTE Describe Image marketing view with Petra presenting a chart and preparation timer

PTE

Build speed across PTE task types with focused drills, full mock tests, instant score estimates, and practical Speaking and Writing feedback.

Start PTE prep →

CELPIP

Get ready for CELPIP with realistic Canadian test tasks, full mock tests, scored Speaking and Writing, and a skill profile that shows what to work on next.

Start CELPIP prep →

Duolingo English Test

Prepare with interactive DET-style tasks, mixed-skill practice, full mock tests, and fast feedback across Reading, Listening, Speaking, and Writing. Every number is a PrepEx practice estimate, not an official DET score.

Start DET prep →

Practice quality

Practice shaped by real educators

Language educators, exam specialists, and assessment reviewers write and review test-specific practice across all five exams.

Meet the content team

Why PrepEx

Expert-authored practice, detailed feedback, and assessment technology recognized by the testing industry.

Expert-written, current-format practice

Language educators and exam specialists write and review questions around each test's current task families, timing, and interaction patterns.

The deepest feedback

Writing and speaking come back in seconds with criterion-level analysis, corrections, strengths, weaknesses, and specific next steps — not just a score.

Award-winning grading fidelity

PrepEx won the 2025 Asia Association of Test Publishers EdTech Award. Our grading is built around each exam's criteria and returns diagnostic skill breakdowns you can use.

At a glance

PrepEx by the numbers

Five exam-specific products, used by learners around the world.

Countries worldwide

27%

Average score boost

50,000+

Students

1M+

Assessments graded

Expert guidance

Advised by language and technology experts

Industry leaders guide PrepEx's development across TOEFL, IELTS, PTE, CELPIP, and DET.

Meet our advisors

Columbia, Taft School

Ask Petra anything.

Petra is the AI tutor built into every exercise. Ask why an answer was wrong, drill a weak area, or practice speaking with her out loud in a live conversation.

How Petra works →

What students say

Student testimonials submitted via email

"I went from 81 to 106 in two months. The AI grading pointed out things I didn't even realize I was doing wrong. Petra helped me stop memorizing and just sound more natural."

Anastasia Kolokoltseva

Grad school applicant

Legacy TOEFL: 81 → 106 (+25)

"I was stuck at band 4.0 because my answers sounded memorized. PrepEx made each practice feel like the real test and showed me exactly what to fix in my speaking and writing."

Christine Li

IELTS student

IELTS: 4.0 → 7.5 (+3.5 bands)

"I practiced for seven weeks straight and still didn't run out of new questions. PrepEx helped me reach my target score."

Maximillian Brandt

Software developer

TOEFL: 4.0 → 5.5 (+1.5)

Free to start on every test. Paid plans are per test and start at $20/month, billed quarterly.

Frequently asked questions

Which test should I take?

It depends on where you're applying: universities, immigration programs, and employers each accept different tests. Test Finder walks you through it in about two minutes.

Does one subscription cover all five tests?

A subscription covers one test. Your PrepEx account can hold subscriptions to more than one test if your plans change.

Can I practice before paying?

Yes. Every test has free practice items so you can see how the scoring and feedback work first.

How is my writing and speaking scored?

Against the official criteria for your test — band descriptors for IELTS, the 1–6 scale for TOEFL 2026 — with feedback in seconds.