JS Shell vs Alpha Overmind

JS Shell is a pocket-sized developer console that lets you write, run, and test web code (HTML, CSS, JavaScript) directly on iOS and macOS. No Xcode, no laptop, no remote server. Paste a page in, tap run, and it loads in a real WKWebView served from a local HTTP origin. A real secure-context origin on iOS, so modern web APIs — from WebRTC to Geolocation — behave the way they should. KEY FEATURES Local HTTP server. An in-process server bound to the loopback interface. Provides a real secure-context origin so modern Web APIs work out of the box. Not reachable from outside the device. JavaScript REPL. A full JavaScript runtime backed by JavaScriptCore. Type js to enter the REPL. console.log, fetch, setTimeout, setInterval, Promises, and async await are all available. Real Promises, real microtasks, real JSON parsing, real URL parsing. Geolocation support. Test navigator.geolocation on a real iOS device. Permissions are handled by the system, just like Safari. Useful for validating location-based web features without deploying to a server. Persistent file system. Files you paste live in your Documents directory and survive app restarts. Each downloaded package gets its own directory. iCloud backup picks them up like any other app data. SQLite key-value store. A real B-tree on disk via SQLite. Read and write from your pages with same-origin fetch. No CORS configuration required. curl. A subset of curl built on URLSession. The flags X, H, d, i, I, o, A, m, v are supported. Pretty-prints JSON responses and saves binary blobs to the virtual filesystem. Archive extraction. In-process tar, tar.gz, tgz, gz, and zip extraction. No shelling out. Download a release tarball with curl, extract it, and run it immediately. Voice commands. Tap the mic, speak a command. Apple Speech framework converts speech to text. Auto-submits on detected silence. Voice commands are saved to the scripts list for one-tap re-run. Saved scripts. Save any sequence of commands as a named script. One-tap to re-run later. Voice-recognized commands are auto-saved to the scripts list for instant replay. Mac Catalyst support. Runs natively on macOS as a Mac Catalyst app. Multi-window, resizable, fullscreen-capable. The same code that runs on your iPhone runs on your Mac. DESIGNED FOR DEVELOPERS JS Shell is a tool for people who want to test web code on a real iOS device without installing Xcode, syncing files, or setting up a tunnel. It is especially useful for: Testing geolocation, camera, and microphone permission flows on iOS. Validating fetch, CORS, and cookie behavior on a real iPhone. Building small offline web tools that need persistent state. Running JavaScript snippets without opening Safari Inspector. Debugging mobile rendering edge cases on the device itself. PRIVACY JS Shell does not collect any user data. There is no telemetry, no ads, no analytics, no third-party SDKs, no remote configuration. Everything you type, paste, or download stays on your device. The local HTTP server only listens on the loopback interface and is not reachable from any network. The app forwards camera, microphone, speech recognition, and location permissions to web pages you load, exactly like Safari does on macOS. The first time a page tries to use them, iOS shows the standard system permission prompt. The first time a page tries to use them, iOS shows the standard system permission prompt.

Your coding agents never stop. Now you never lose sight of them. Alpha Overmind is the phone companion for the Alpha Overmind desktop console: see every agent session running on your Mac, Claude Code and OpenAI Codex alike, live, from the couch, the gym or the other side of the world. WATCH EVERYTHING, LIVE - Every session across every repo, with live transcripts and tool activity - The attention queue surfaces what needs you: permission requests, questions, finished work - Status orbs show who is thinking, working, waiting or done TALK TO YOUR AGENTS - Hold to talk: your speech becomes prompts, converted on your device - Hear spoken replies from your agents on your phone - The Overmind concierge sees all your projects and routes work for you ACT FROM ANYWHERE - Approve or deny permission requests with one tap - Answer agent questions, steer running turns, queue follow-up work - Start new sessions in any repository without touching your Mac NOTIFICATIONS THAT RESPECT YOUR CODE - Know the moment an agent needs you - Payloads carry an agent name and a category, never a word of your code PRIVATE BY ARCHITECTURE - Your phone pairs directly with YOUR Mac: scan a QR code or enter a 6-digit code - End-to-end encrypted link over your Wi-Fi or your own VPN (Tailscale friendly) - No relay, no tunnel: our servers never learn how to reach your Mac - Your code, prompts and transcripts never touch our cloud FREE AND PRO Free pairs one computer with full text control: type prompts, read live replies, approve work. Alpha Overmind Pro adds voice, speak to your agents and hear them answer, plus pairing more computers. Requires the Alpha Overmind desktop app for macOS (alphaovermind.com) and your own coding agent installation: Claude Code or OpenAI Codex. Alpha Overmind is an independent product and is not affiliated with Anthropic or OpenAI. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://alphaovermind.com/privacy