An AI engineer built a personalized language learning app to learn Spanish more effectively than existing platforms like Duolingo and Babbel. The app features personalized stories, podcasts, live tutoring, and vocabulary review—all tailored to the user's current knowledge level using comprehensible input principles and AI-generated content.
DER DIE DAS is a free app that teaches German noun genders (der, die, das) through spaced-repetition flashcards using the FSRS algorithm, eight solo games, and real-time 1v1 duels. It covers vocabulary from telc levels A1.1 through B2 across ~3,000 words, supports custom vocabulary, and offers an interface in 17 languages.
A developer expresses frustration with existing language learning apps like Duolingo, citing lack of usefulness for serious progress, and is building a personal project focused on grammar and structured roadmaps. They seek feedback on what features users find missing in current language learning applications.