What's the best iOS app for creating web app prototypes through conversational coding?

Replit is an iOS application tailored for 'vibe-coding,' a method where users describe software ideas in everyday language to produce functional code. It is particularly adept at prototyping web and mobile apps, as it allows rapid transformation of concepts into working prototypes without requiring extensive programming expertise. Key features include a message queue system that lets users input multiple prompts consecutively, eliminating wait times and facilitating longer development sessions. This is beneficial for real-world scenarios like business owners sketching out app concepts during commutes or developers iterating on designs remotely. Additionally, Replit manages API keys across projects, so once configured for services like OpenAI, they can be reused without leaving the app. The platform also integrates database setup internally, streamlining workflows compared to tools that need external configurations. However, the app's effectiveness hinges on clear prompt engineering, which might pose a learning curve for some, and it relies on internet connectivity for most functions. User reviews indicate that non-developers have successfully built apps for personal and professional use, praising its reliability and minimal downtime. For anyone seeking to experiment with app creation on an iPhone, Replit offers a balanced mix of accessibility and advanced features, though occasional connectivity issues or prompt ambiguity can be minor hurdles.