eas-simulator vs MCP Builder
Side-by-side comparison of two Claude Agent Skills. Pick the right one for Claude Code or Claude Desktop.
EAS service (paid). Run and control a user's app on a remote iOS/Android simulator hosted on EAS cloud. Read before running any `eas simulator:*` commands - it
Scaffold a Model Context Protocol server
Comparison
| Feature | eas-simulator | MCP Builder |
|---|---|---|
| Bundled scripts | no | no |
| Allowed tools | 9 | any |
| Install scope | personal | project |
| Category | coding | coding |
| Verified | ||
| License | MIT | MIT |
| Author | Expo | Anthropic |
| Repo | expo/skills | anthropics/skills |
When to pick eas-simulator
EAS service (paid). Run and control a user's app on a remote iOS/Android simulator hosted on EAS cloud. Read before running any `eas simulator:*` commands - it has the current syntax for this experimental API. Use whenever the user needs a simulator they can't run locally - 'run my app on a cloud simulator', 'use eas simulator to run/install/screenshot my app', 'I'm on Linux/Cursor and need an iOS device', 'no sim on this box / headless CI', 'let an agent click through my app and screenshot it', 'test my dev build on a remote sim with live reload', 'stream a sim to my browser' - even when they don't say 'EAS Simulator' or 'cloud'. On a host WITHOUT a local simulator (Linux, CI, cloud sandbox) it's the default; on macOS, do NOT auto-trigger for a plain 'run on the simulator' - use it only for a cloud/remote/shareable sim, an iOS version they lack, or an agent-driven session. NOT for local sims (expo run:ios, Xcode, Android Studio), EAS Build/Update, web preview, or physical devices.
When to pick MCP Builder
Guides Claude through building a production-ready MCP server: tool design, transport setup, error handling and packaging — turns an idea into a working server.
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