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Android · free · no account

Create software from your phone.

An agent that writes the code, runs it in a Linux inside your phone and delivers the result: a website, an APK, a game, a script.

Download for Android See how it works

1.0.3 · October 25, 2026 · 67,4 MB · Android 8.0+ · arm64

Home: your projects
0 €No ads, no purchases, no subscription
0 accountsYour data never leaves the phone
51 piecesLanguages and engines in the Ágora
14 languagesInterface and legal texts

The problem

You have the idea and a phone.
What was missing was the workshop.

An AI chat dictates code you have nowhere to run. Hefesto brings the place to run it: a full Linux, compilers, preview and the agent that drives them.

01 · Agent

Ask in your own words. The agent plans, writes and runs.

It creates the files, installs what's missing, runs the commands and fixes what fails. Every step is a card you can open. You decide how much rein to give it.

ReviewPlanAuto
Conversation with work cards
02 · Linux

A full Ubuntu, no root.

A real terminal, apt, Python, Node, Go, Rust, Git. The same you'd use on a laptop.

Terminal
03 · Preview

See what you're making without leaving.

Websites and apps open inside Hefesto. The agent can also look at the screenshot and fix things.

Preview
04 · APK

From a sentence to an installable.

Gradle and the Android SDK compile on the phone. The APK comes out ready.

Workshop: build the APK
05 · Games

Godot 4 inside.

Export to Android, web, Linux and Windows. Models and sounds from the Library.

Workshop: export the game
06 · Memory

It remembers the project.

What was agreed stays in a readable file you edit yourself. The agent reads it when it comes back.

The project's memory
07 · The intelligence

Your key or your model. No middlemen.

OpenAI, Google, Anthropic or OpenRouter with your key; external agents with your account; or a local model on the phone. Hefesto charges nothing and keeps nothing.

Hefesto's agents
08 · GitHub

Clone, push, publish.

Your GitHub account connected: repositories, commits, pull requests and Pages from the phone.

Publish on Pages

How it works

Three steps. The third is the one that matters.

01

Describe

“A website for the bakery with the menu, opening hours and a map.” Typed or dictated, with photos or files if needed.

02

The agent works

It creates the project in its Linux, writes, installs, runs and tests. If you choose Review, it asks before every change.

03

You get something that works

The website shows inside Hefesto itself. The app installs. The file exports. And you keep asking for changes.

GitHubtmuxLuajqNode.jsPythonC / C++GoRustPHPJavaAndroid SDKGradleGitFFmpegBlenderGodotSQLiteGitHubtmuxLuajqNode.jsPythonC / C++GoRustPHPJavaAndroid SDKGradleGitFFmpegBlenderGodotSQLite

The Ágora

The workshop ships with its own catalog.

Compilers, Godot, interpreters and external agents install from the Ágora with one tap, no setup.

The Ágora: tool catalog

Questions before downloading

What people usually ask.

Do I need a computer at any point?
No. Writing, compiling, previewing and publishing all happen on the phone.
How much does it cost?
Nothing. There are no ads, purchases or paid version. If you use an AI provider with your key, you pay them for what you consume; Hefesto doesn't step in. Support on Ko-fi is voluntary.
Do I need an AI key?
For the agent, yes: your own from OpenAI, Google, Anthropic or OpenRouter; or an external agent with your account; or a local model. Hefesto doesn't ship a key of its own nor asks for one.
What happens to my data?
It stays on the phone. There's no Hefesto account or server. The only thing that leaves is what you send to the AI provider you choose, to GitHub or to the sources you download from. Privacy.
Why isn't it on Google Play?
Hefesto includes a full Linux and compiles APKs; it's distributed as a signed APK from GitHub so it doesn't depend on a store's terms. The app tells you by itself when there's a new version.

All questions, requirements and contact in Help

News

1.0, with a brand-new look.

The whole app has a new look, plus many more quality-of-life improvements. Here is what's inside:

1.0.3current · October 25, 2026
Fixed
  • Agora tools (PHP, .NET, Godot, Chromium…) no longer trip over dbus on a clean install: the system bus now ships in Hefesto's Ubuntu base, and if a package is left half-configured the installer reconfigures and retries on its own.
  • When reporting a problem you can leave your email to get a reply.
  • If your network won't let you download the big tools (Gradle, Node, Kotlin…), you can import the official file downloaded another way: the card installs it and the store recognizes it.

All versions

Start with something small this afternoon.

Download the APK, open Hefesto and ask it for your first project. Free, no account.

Download Hefesto 1.0.3