LinguaDuck — Multi-Language Learning App (Flutter/Dart)

LinguaDuck is a cross-platform language-learning app for iOS and Android built with Flutter 3. I designed the architecture with Riverpod + GoRouter and a clean UI. Seven study modes: Flashcards, Intensive Reinforcement, Memory Master, Typing, Rapid Recall, Listening, Mixed Practice. Features: TTS with IPA hints, spaced-repetition, progress/XP & achievements, deck editor with import/export, custom session sizes, themes, and full localization (40 UI languages). I shipped the iOS version to the App Store.