WordPecker App is an innovative language learning tool designed to help users efficiently master new languages through personalized learning experiences. It features Duolingo-style interactive courses and user-customized vocabulary lists, allowing for seamless word additions from books, articles, or videos, along with LLM-generated course reviews. The product utilizes cutting-edge AI technology, providing users with an immersive learning experience while supporting multiple language preferences, catering to the needs of various language learners. Its open-source nature encourages community involvement and continuous improvement.