Arno is a leading preparation platform for English proficiency tests, serving over 250,000 students worldwide. We provide AI-powered practice questions, full-length mock tests, instant scoring, personalized feedback, and personalized study plans. We're a fast-moving startup building the future of English test preparation, and in 2026, we're expanding our coverage to include PTE Academic, TOEFL, IELTS, and TOEIC alongside our flagship Duolingo English Test (DET) product.