Edit anywhere
A real code editor (CodeMirror 6) tuned for touch — syntax highlighting, multi-tab editing, and a file explorer built for one-handed use.
Calypso IDE
Write, run, and version control real code — from your phone.
A real editor that fits in your pocket
Calypso is a phone-first code editor for Android. It pairs a fast CodeMirror-based editor with on-device code execution and full Git support — so you can build, run, and commit without a laptop.
Run on-device
Python (Pyodide) and JavaScript run right in the app — no setup. Import packages on the fly via esm.sh and micropip.
Real IntelliSense
Type-aware autocomplete, hover, live diagnostics and go-to-definition — from language servers running on-device. Install once, it just turns on.
Go further with Termux
Power users can wire up Termux for a real toolchain — node, npm, python, git — with output streamed live, plus an interactive terminal and a web preview for dev servers, all inside Calypso.
Create real web apps
Start React, Vue, Svelte, or Angular projects from Calypso. The IDE scaffolds the project through Termux, installs dependencies, and opens a standard portable repo you can also edit on desktop.
Full Git workflow
Clone, fetch, pull, push, and resolve merge conflicts — credentials remembered so you’re not retyping tokens every push.
Where to next?
- New here? Start with Getting started.
- Want real autocomplete, hover and diagnostics? See IntelliSense.
- Want to understand what runs where? See What works where.
- Need a real toolchain (
npm install, native packages)? Follow the Termux setup guide. - Want an interactive shell or to preview a dev server in-app? See Terminal & web preview.
- Hit an error? Check Troubleshooting.