PrepEx Pro review

PrepEx Pro suits learners who learn by doing a lot of practice and want it graded straight away. The $39.99 a month subscription covers more than 3,500 ETS-aligned questions with no daily limits, more than 35 full practice tests that include all 4 sections, timed and AI-graded, and 24 section tests. An 11-minute diagnostic builds a custom study plan, and three personalized progress reports a week analyze your practice data. The AI coach, Petra, comes with 6,000 credits a month, which PrepEx says covers up to 50 minutes of conversation. There is also a grammar suite with sentence-building drills and AI flash cards. Pro subscribers get a 10% TOEFL registration discount code, and because PrepEx is a TOEFL Channel Partner, they can add an official ETS TOEFL Practice Online test for $40 rather than the $49 single-test price. The catch is that the practice items are written to ETS specifications, not taken from ETS, and there are no human teachers.

Who it is for

learners who want unlimited AI-graded practice

Price

PrepEx Pro $39.99 per month; one official ETS practice test can be added for $40.

Renews at $39.99/month.
Quoted from the vendor pricing page on November 13, 2026.

Key features

• 3,500+ ETS-aligned questions with no daily limits
• 35+ full practice tests with all 4 sections, timed and AI-graded
• 24 section tests
• 11-minute diagnostic test and personalized study plan
• 10% off TOEFL registration with a Pro subscription

Strengths and weaknesses

• Strength: Instant AI grading on all 4 sections
• Strength: New questions added twice a week
• Strength: Pro users can add an official ETS TOEFL Practice Online test for $40 instead of $49
• Weakness: The monthly fee adds up if you study for several months
• Weakness: Questions are ETS-aligned rather than official ETS items, apart from the optional add-on
• Weakness: PrepEx states its own preparation is not endorsed or approved by ETS

Key facts

• Price: $39.99 per month
• Questions: 3,500+ ETS-aligned
• Full practice tests: 35+
• Section tests: 24
• Registration discount: 10%

Where it ranks

PrepEx Pro is No. 3 in our Best TOEFL Prep Courses verdict.