PrepEx AI offers an AI‑driven TOEFL preparation platform that provides over 2,500 practice questions aligned with the 2026 test format. The service delivers personalized feedback on writing, speaking, listening, and reading, including pronunciation analysis and instant scoring, while a 24/7 AI tutor named Petra answers questions and tailors study tips to each learner’s progress.
Funding
Funding not disclosed
Founders
Product
Problem
Many TOEFL candidates struggle to improve their scores because available practice resources are not fully aligned with the official exam format, feedback is generic or delayed, and personalized coaching is either costly or inaccessible.
Solution
PrepEx AI delivers an AI‑driven TOEFL preparation platform that aligns every question with the ETS‑specified format for the 2026 test. Learners access over 2,500 practice items covering Writing, Speaking, Listening, and Reading, each graded instantly by AI calibrated to official scoring rubrics. The system provides detailed, section‑specific feedback on structure, grammar, pronunciation, and fluency. Petra, a 24/7 AI tutor, answers user queries, offers real‑time conversation practice, and generates personalized study tips based on each session’s performance. An AI‑powered diagnostic assessment creates a custom study roadmap, while ongoing analytics highlight strengths and target areas for improvement. All features are available through a web dashboard that tracks progress and delivers weekly progress reports.
Target Audience
PrepEx AI serves students preparing for the TOEFL exam—including university applicants, graduate‑school candidates, and professionals seeking English proficiency certification—who need exam‑aligned practice and immediate, data‑driven feedback.
Features
- 2,500+ ETS‑aligned practice questions for all four TOEFL sections, updated twice weekly
- AI grading that mirrors official ETS rubrics, delivering paragraph‑level writing feedback and pronunciation/fluency scoring for speaking
- Petra AI tutor with up to 6,000 monthly credits for real‑time conversation practice and personalized coaching
- Unlimited timed full‑length practice tests that replicate exam timing and pressure
- AI‑generated flash cards and a grammar mastery suite with spaced‑review drills
- Diagnostic 11‑minute AI assessment that produces a custom study plan and three weekly progress reports
- Cloud‑based analytics dashboard that visualizes performance trends and recommends focused study actions