I need a mobile vocabulary flashcard app for educational purposes, targeting children aged 5-13+. The app should be available on both iOS and Android platforms and feature a colorful and playful design. Key Features: - User-generated content: Children can add their own words/phrases. - Flashcard details: Each flashcard should include a picture, definition, word class, and example sentence. - Audio feature: An audio button to pronounce each word/phrase. - Save functionality: Ability to save newly created flashcards to their phones. Ideal Skills and Experience: - Experience in mobile app development for both iOS and Android. - Strong design skills to create a colorful and playful user interface. - Background in educational apps or children's apps is a plus.