Evan Bacon

Building Expo. Follow me on X for updates.

Open Source Projects

Expo

• expo — The universal React framework
• bun create target — Apple multi-target from the command-line (Widgets, App Clips, +43 more)
• expo-quick-actions — Home screen shortcuts and dynamic icons, one API for iOS and Android
• Expo MDX — MDX that runs everywhere: iOS, Android, and web
• apple-health — Apple HealthKit bindings for Expo
• expo-ahap — Play Apple haptic patterns (AHAP) from React Native
• Apple colors for Expo — Apple's dynamic system colors on every platform
• crispy — Drop-in UI primitives for Expo Router apps
• metro-minify-esbuild — Drop-in ESBuild minifier for Metro — dramatically faster bundles

Apple ecosystem

Tools for building better Apple software.

• serve-sim — npx serve but for iOS Simulators
• xcode — Blazing fast .pbxproj parser in pure TypeScript
• inspect-webkit — Inspect iOS Safari and WebViews from Chrome DevTools
• bun create xcode — Spin up Xcode projects from the command-line, agent-ready
• bun create symbol — Create SF Symbols from the command-line

Agent

• agent-rsvp — Speed-reading skill that helps you read agent plans and output faster using Rapid Serial Visual Presentation (RSVP)
• serve-sim — npx serve but for iOS Simulators

Apps & Demos

• Crossy Road — Crossy Road clone in the browser and mobile with three.js
• Generative mobile chatbot — Full-stack AI chatbot that generates rich native UI cards on edge-servers. Showcase app for React Server Component for React Native. Runs on iOS, Android, and web.
• Server-driven UI Google Home client — Google Home client with WebRTC, React Server Components, and Expo DOM components. Tests complex authentication with universal React Server Components on web and native.
• Pillar Valley — 3D arcade game you can play on any device. Used to dogfood edge-cases in Expo.
• Expo Movies app — Movie search powered by React Server Components in Expo Router
• Expo x shadcn — Shadcn components running in Expo DOM Components with 'use dom'. Mixes native APIs with popular web components.

Examples

• Expo chat-template — Universal chatbot template built with Expo Router. Used for training and evals.
• app that builds apps — LLM chatbot app that can generate React Native components, bundle them, then evaluate in-app/website.
• expo-router-layouts-example — Shared layouts and nested navigation patterns in Expo Router
• expo-router Spotify client — Spotify client built with universal React Server Components
• expo-router Twitter — Twitter rebuilt with Expo Router. First public example of Expo Router for a moderate layout.