A modern code editor, terminal, Gradle workspace, and development toolchains—all in one Android app.
Metals-powered Scala completion |
Readable Gradle output and successful task execution |
Inline diagnostics and one-tap quick fixes |
Java completion backed by JDT LS while a Gradle application keeps running |
Types and documentation without leaving your code |
A touch-friendly project tree for real repositories |
Edit while Spring Boot runs in an integrated task tab |
Cosmic IDE lets you create, edit, build, run, and manage projects without relying on a desktop computer. It is designed for learning, experimenting, fixing code on the go, and working on serious projects from a phone, tablet, or Android desktop setup.
| Write comfortably | Build and run | Stay in control |
|---|---|---|
| Syntax highlighting, completion, diagnostics, navigation, customizable fonts, and Material You themes | Integrated Gradle tasks, project commands, and a full terminal | Local project files, Git workflows, ZIP import and backup, and selectable JDKs |
- Create ready-to-use Java, Kotlin, or Scala Gradle projects.
- Open and edit projects with tabs, a file explorer, autosave, and rich code intelligence.
- See errors, completions, hover information, signatures, references, and navigation from supported language servers.
- Install packages directly from the Arch Linux ARM repositories through pacman, giving you access to a broad ecosystem of development tools and utilities inside Cosmic IDE.
- Build, test, run, and inspect Gradle output without leaving the editor.
- Clone repositories and use common Git actions such as pull, push, commit, branch, and checkout.
- Work in an interactive Linux terminal with familiar command-line tools.
- Import a project from ZIP and export backups through Android's document picker.
- Personalize font, font size, indentation, word wrap, ligatures, line numbers, whitespace markers, sticky scroll, and other editor behavior.
- Add custom language servers, TextMate grammars, project types, commands, and plugins.
Cosmic IDE provides a guided first-party setup for:
| Language | Code intelligence |
|---|---|
| Java | Eclipse JDT Language Server |
| Kotlin | Official Kotlin LSP |
| Scala | Metals |
| Gradle and Groovy | Gradle Language Server |
Other languages can be added with a compatible language server and TextMate grammar. Rust, C++, XML, and similar workflows can be configured when their Linux/arm64 tools support Android's app environment.
Download the latest successful main build from
nightly.link.
Note
The current development version targets Android 8 or newer and is intended for arm64 devices.
- Install Cosmic IDE and open it.
- Choose and install a JDK when prompted.
- Complete the guided development-tool setup.
- Create a project, import a ZIP, or clone a Git repository.
The first setup downloads a Linux runtime, JDK, and selected development tools. Use a stable connection, keep the app open, and make sure the device has enough free storage. After setup, the Projects screen becomes the starting point for your work.
For a walkthrough of projects, the editor, builds, Git, terminal sessions, and settings, see the user guide.
- Material You interface with light and dark themes
- Touch-friendly project explorer and editor controls
- Android document picker integration for imports, backups, grammars, and custom fonts
- An Arch Linux ARM userspace with broad
pacmansupport and access to its aarch64 repositories - App-private Linux environment—no root access required
- Phone, tablet, keyboard, and Android desktop workflows
- Local projects that remain under your control
Most packages from the Arch Linux ARM repositories can be installed directly with pacman.
Packages that require unavailable kernel features, privileged operations, or unsupported hardware
may still be limited by Android's application sandbox.
Advanced language and tool support
Cosmic IDE can start standard-input/output language servers inside its app-private Linux environment. A custom server can be associated with a file extension and an optional TextMate grammar from an HTTPS link, Android document, or local file.
The same environment is available to the terminal, compilers, build tools, Gradle, and custom project commands. Compatibility depends on whether the required binaries support Linux/arm64 and can run within Android's application sandbox.
Custom startup commands execute with the app's permissions. Only use commands and project build scripts you trust.
Read the language-service guide · Read about data and permissions
No. Its development tools run inside the app's private environment using normal Android permissions.
Editing and already-installed tools can work offline. Initial setup, dependency downloads, Git network operations, and some builds still require an internet connection.
No. Java, Kotlin, and Scala have the most guided experience, but custom language servers, commands, and project types can support other toolchains.
That depends on the project and device. Cosmic IDE offers a complete mobile workflow, but large builds and language servers are still limited by the memory, storage, battery, and permissions of an Android application.
Start with the user guide and troubleshooting section, then ask in the community or open a GitHub issue.
Friendly bug reports, feature ideas, documentation improvements, and code contributions are welcome. Developers can begin with the contribution guide.
Cosmic IDE is free, open source, and built without ads or paid feature gates. Support helps with:
- Maintaining the Arch Linux ARM runtime and broad
pacmancompatibility - Adapting language servers, JDKs, Gradle, and other development tools for Android
- Tracking Android platform changes and testing across different devices
Financial support is optional. Useful bug reports, documentation improvements, and code contributions are equally valuable.
Other donation methods
- Bitcoin:
bc1q3eesyfn7lhql4c2khv56cyvw2374zkhe7r97hz - Ethereum:
0xD80A8D6E0fa433A8bDFC2D3F325159Db70605816 - Monero:
848dAWBVk8GMaoRHg6HUP5CbkpY9pJra1KNQAo9yJ6vbJLFsjFD8ZHkGpi6FhVY7rsD4U9iR7brk64eknsC3bS7tV9JRU4f - Solana:
7FxTAJLmhXFp6wxVbUTpf8jDmzEX1CKVMdE8oLPNQvyb - Litecoin:
ltc1q3pqyj5ge5rdmqr00w03x4tlhm6rhcc6wrfyx8k - UPI:
pranavpurwar@fam
Cosmic IDE builds on open-source projects including Sora Editor, Termux, and the Gradle Tooling API. Thank you to Iyxan23 for the application icon and to every contributor who has helped improve the project.
Cosmic IDE is free and open-source software licensed under the GNU General Public License v3.0.