Cross-Platform AI App Prototype

I’m building a small proof-of-concept AI application that people should be able to open on iOS, Android, and a standard web browser, type a prompt into a single text box, and immediately receive an AI-generated response.

The core flow is intentionally simple—text input only—so the real work is in wiring up a lightweight, reliable front-end on each platform, connecting it to the language-model endpoint I’ll provide, and returning the response cleanly. I already hold the API keys and model access; what I need is your cross-platform engineering skill to:

• Spin up the web client (React, Vue or similar; I’m flexible)
• Ship companion builds for iOS and Android (React Native, Flutter or native—use what you’re fastest with)
• Handle the shared API layer, basic error handling, and simple usage logging

Once all three surfaces echo the same response set, the job is done. A concise README explaining how to run and rebuild each target completes the hand-over.