Run Code in a Dozen-Plus Languages on Android — On-Device & Offline

Most ways to "run code" on a phone quietly send it somewhere else — a cloud runner, a remote sandbox, a website's server. That's fine until the signal drops or you'd rather your code didn't leave your device. PocketCode does the opposite: it executes real languages on the device itself, so running a script is as local as opening a note.

Here's the full picture of what runs, what's ready instantly, and what needs a one-time download.

Five languages, ready the moment you install

These ship inside the app. No download, no account, no connection — install PocketCode, open a file, tap Run:

Language	What runs on-device
Python	A complete CPython 3.11 with the full standard library
JavaScript	A real bundled Node.js runtime
C	An on-device C compiler that compiles and runs your code
Ruby	A real Ruby interpreter
PHP	A real PHP interpreter

On top of those, HTML, Markdown and JSON get instant local preview and rendering — no runtime required. So the everyday trio of "write a script, build a page, check some data" works the second you open the app, on a plane or off-grid.

Want the deep dive on one of them? We wrote a full guide to running Python on Android — how CPython executes locally, what the standard library covers, and its honest limits (no pip, so it's a scripting and learning environment, not a data-science stack).

A dozen more, one download away

Beyond the bundled five, PocketCode offers optional language packs. You download a pack once, and from then on that language runs on-device and offline, just like the built-in ones. The lineup includes:

Go · Rust · TypeScript · C# · Swift · Dart · Zig · Lua · Perl · C++

That takes the total to more than a dozen languages you can execute from the same editor, on the same phone, without a server in the loop. Some packs are interpreters and some are full compilers, so per-language guides (coming in this series) will be precise about exactly what each one runs.

Why "on-device" is the whole point

Running locally isn't a technical footnote — it changes what a phone can be for:

• It works with no connection. Every bundled language, and every pack once installed, runs fully offline. This matters most exactly where mobile shines: commutes, flights, patchy coverage, emerging-market networks.
• Your code stays yours. Nothing is shipped to a third-party runner to execute. Network access is off by default and gated by a setting.
• There's nothing to assemble. No terminal environment to bootstrap, no toolchain to hand-compile. The runtime is already there; you just press Run.
• It's instant. No cold-start on a remote container — execution begins on the device immediately.

The editor around it

A runner is only half the story; you also want to write the code well. Every language plugs into the same desktop-class editor: LSP-backed autocomplete and IntelliSense, TextMate syntax highlighting, on-device formatting, multi-cursor editing, a programming symbol bar, and real code navigation. Output streams into a proper console — print/console.log, stack traces, exit codes and all — and for anything shell-shaped there's a real Linux terminal alongside it.

What this is, and isn't

Being straight about scope keeps expectations honest:

• Great for scripting, learning a language, algorithm practice, automation, prototyping, and running real code away from a desk.
• Not a full native build farm. Heavy compute runs at interpreter speed, and runtimes that rely on huge native ecosystems (think Python's C-extension packages) stay within what each language ships on-device.

Within those lines, it's genuinely a pocket-sized multi-language runtime — and there isn't much else on Android that runs this many languages, this locally.

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One phone, more than a dozen languages, all executing on the device in your hand.

PocketCode is heading to Google Play. Join the pre-registration to run your language of choice on your own device.