I need a fully-functional mobile application that lets users practise spoken English for everyday situations and interview preparation through natural, AI-driven conversations. The core of the product is a conversational engine that handles both real-time voice and traditional text chat, offers scenario-based role-plays, and delivers instant, actionable feedback. Key functionality I want built into the first release: • Interactive voice conversations that recognise, understand, and respond to users in real time. • Text-based chat mode for quieter environments or quick drills. • Role-play scenarios (e.g., job interviews, small-talk, travel), with the ability to add new scenes easily from an admin panel. • Immediate feedback on pronunciation, vocabulary, and grammar/sentence structure, ideally surfaced right after the user’s turn so learning is truly iterative. • Gamification elements (points, badges, streaks) to keep motivation high, plus a clean dashboard that tracks progress over time. • Customisable learning paths so a beginner, an intermediate learner, or an interview candidate can each choose a route that matches their goals. I’m open to the tech stack, but please specify which speech-to-text, text-to-speech, and language-model APIs you would integrate, along with any frameworks you favour for cross-platform deployment (for instance, Flutter, React Native, or a native build). Deliverables will include source code, compiled builds ready for TestFlight/Google Play testing, brief setup documentation, and a short demo video walking through the main flows. After acceptance, I’d like the option to engage you for updates and additional content packs. If your background includes conversational AI, mobile app development, and a clear eye for user-centric design, I’d love to see how you’d bring this concept to life.