Building a Mobile App with OpenAI Codex (Better than Claude Code)

I built a Swift iOS app that builds apps.. a better, simpler alternative to Replit, built entirely without writing code. Using OpenAI's Codex desktop app, Xcode, and the Claude Agent SDK (Claude Code SDK), I created "Jerry" which is an iMessage style vibe coding app that generates and hosts web and mobile apps through natural conversation. In this video, I walk through the entire process: -designing the UI in Paper (a Figma alternative for AI agents), -building the Swift app with Codex, -integrating the Claude Agent SDK for AI-powered app generation, -connecting the Vibecode CLI for hosti…