If you're looking for a tool that offers practice tests and feedback specifically for the Duolingo English Test, EduX is a good option. It offers full-length practice tests, instant scoring, and feedback using AI technologies like GPT-4 and Whisper AI. With features like AI-scored video recordings, speaking and writing practice sections, and unlimited practice questions, EduX can help you improve your language skills and costs $15/month.
Another good tool is ELSA Speech Analyzer, which is geared for giving you real-time feedback on conversational skills, focusing on pronunciation, intonation, grammar and active vocabulary. That makes it a good option for improving your English pronunciation and speaking fluency and for preparing for a range of English language exams.