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    Write Once Run Anywhere Native Mobile Apps
    Use your existing Java(tm) skills to target iOS, Android, Windows & more with one code base!
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    Limitless possibilities!
    120M apps installed on devices! Join our huge & active open source developer community and build amazing apps. Check out our free courses and tutorials!
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    Use Any IDE, Leverage Your Existing Skills
    Codename One is open source and seamlessly integrates with NetBeans, IntelliJ & Eclipse. Codename One gives you full access to native code both in Objective-C, Android's native VM, C# etc...
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    Codename One 3.1 is now LIVE!
    Check out the new features & schedule for 3.2...

Download for free and get started right away!

Get Started

One of a kind set of features

Codename One makes cross platform development simple, seamless and maintainable

High DPI Support

Layout managers, multi-images, 9-piece borders and dozens of features designed to dynamically adapt your UI to all resolutions/densities.

Builtin Common Controls

Side menus, swipe containers, pull to refresh, infinite scroll and many other patterns are builtin

Full access to native

When you need to integrate with native features you can invoke Objective-C/Dalvik code thru native interfaces while maintaining portability!

Works with All IDE's!

NetBean, Eclipse & IntelliJ are fully supported

High Performance

Codename One is native to Android and generates native C code for iOS. It's as if you coded the app in C by hand.

GUI Builder/Fast Simulator

Apps can be hand coded or built with drag and drop, the Codename One device simulator is remarkably fast for short development cycles

Desktop & JavaScript targets

You can build a desktop Mac/Windows app as well as a JavaScript app that can run in the browser

Open Source

Codename One is completely open source

Vibrant Developer Community

The developer community shares code, tips and information including many open source libraries

Apps built with Codename One

Check out the full gallery here

Fair Pricing

Codename One is free for commercial use. For advanced features you can pay per developer seat, royalty free. Get more details about the individual plans...


  • Community Support
  • iOS Builds
  • Android Builds
  • Windows Phone Builds
  • Blackberry Builds


  • Unlimited Build Credits
  • Unlimited Build Size
  • Access To Native Sources


$1 Trial Option
  • Push Notification
  • Concurrent Builds
  • Online Training
  • E-Mail Support
  • Phone & Email Support
  • Crash Reporting
  • Desktop Apps


  • High Priority Builds
  • JavaScript App Generation
  • Continuous Integration
  • Office Hours/Phone Support

Latest Posts From Our Blog

Java Mobile Development Webinar 2: The Sequel

On Thursday morning we rolled the cameras for chapter 2 of our exciting new webinar series. This time around there were far fewer (though not zero) technical issues, and we were able to share a productive hour of mobile app development in the company of our fellow coders.

Deprecations, Simplified cn1lib installs & Theme Layering

We decided to discontinue support for building without a certificate, this support was added initially because generating an iOS certificate was so difficult and we wanted developers to see that "it works" before committing to the expense. However, this process is wrought with bugs that are often hard to trace back and error prone. Added to that is the fact that we now have the new certificate wizard which makes the process simpler thus removing the final blocker (no need for a Mac).
We will block this functionality in the build servers by next week and thru the plugin after that.

Javascript, Grow up and Get Threaded

The concept of threads in the Javascript community is a controversial one. The founders and leaders are dogmatically against threads, and have been from very early on.

StartApp integration

When StartApp first launched a few years ago, they were a unique innovative new monetization channel to make money on Android.

Start right now with Codename One, learn more here