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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...

Download for free and get started right away!

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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

What our customers are saying about us

Customer Testimonails

I stumbled upon Codename One nearly a year ago and it's been an exciting adventure so far! I can highly recommend this product to anyone looking for an affordable cross-platform development toolchain that works! A few things that stand out to me are access to native functionality via native interface, easy extension with third-party libraries, active developer support and attractive pricing. Thank you Codename One team for a great job so far!

Chidiebere Okwudire Senior Software Engineer at Sioux, Netherlands
Customer Testimonails

As a mobile developer for over 12 years, I am often asked if I am able to produce both the Android and iOS versions of an app. In order to do this I used to develop the Android version myself and hire an iOS programmer to build the iPhone one for me. But since finding Codename One I can utilise my existing Java knowledge and deliver native apps for both platforms from a single codebase in half the time, at half the cost, with no need to hire anyone. This makes Codename One a very attractive platform not only for increased productivity but also for maximizing profits and stunning clients with delivery times.

Gareth Murfin Freelance Android Developer, Taiwan
Customer Testimonails

With over 2 million installations I can safely state that Codename One is a mature, solid and reliable platform, that allows you to concentrate developing your app and not platform specific implementations.It works beautifully, with heavy duty apps and helped dramatically reduce development costs. Codename One was a key enabling factor to pursue a multi-platform business strategy

Ram Nathaniel CEO and Founder of MathUnderground, Israel
Customer Testimonails

Codename One greatly reduces our development time and costs, while giving us the ability to deliver a custom experience in each platform when needed. Going from design to a working app is a breeze, so we can focus in a strong core for all platforms.

Fabrício Cabeça Senior Developer at Pmovil, Brazil
Customer Testimonails

Fast and efficient way to eliminate the hassle of targeting multiple platforms, without resorting to html5. :)

Rex Green Vision24, South Africa
Customer Testimonails

Codename One has proven to be a productive tool for us - a true write once run anywhere solution!

Fabrizio Grassi Chemetall, Italy
Customer Testimonails

My client requested some non conventional requirements and Codename One gave us good answers for all the challenges that we faced during the app development. Simply a great framework!

Hélio Rugani Sócio Proprietário, Brazil
Customer Testimonails

Codename One has given us the ability to develop apps for all mobile platforms in a short period of time and at a very low cost. Codename One is the most innovative tool of this current generation and I would advise to all developers to try it out today!

Lucky Oscar Masango Founder and CTO at BOi Global Group, South Africa
Customer Testimonails

I believe Codename one is the best cross platform tool for application development, it's simple and fast.One of the best things I've found in codename one is its native access that really allowed us to add functionalities without limiting developers to platform capabilities.

Ali Sayed Senior Developer, Egypt
Want us to build your mobile app? Learn more here

Latest Posts From Our Blog

A Thank You & an Important Update On Android Builds

We'd like to thank all of you who signed up to the pro subscription, the release of 3.3 is the perfect time to do that. So we are opening up the JavaScript build target for 1 year until March 1st 2017 to all current pro subscribers!
If you have a pro subscription you can start sending a JavaScript build right away and experiment with portingyour app to the web...
If you don't have a pro license currently then you have until March 15th to upgrade and enjoy this offer. After March 15th the JavaScript port will return to enterprise only status for everyone who didn't signup prior to that.

Parse, Docs & Updates

Facebook recently announced the closing of parse.com which is disappointing but not totally surprising. Everyone knows a project from a large tech company can just shutdown in a blink of an eye leaving millions of users/developers in limbo. In that sense one of the questions that gets under my skin is what happens if Codename One calls it quits...

Codename One 3.3 Now Live

We are thrilled to announce the immediate availability of Codename One 3.3!
With version 3.3 was tumultuous, we made a lot of earth shattering changes to performance, animations, fonts and many other things. As a result we have a ground-breaking release that requires a step back.
With 3.4 we want to tone down on the "big ticket changes" and work heavily on product refinement. We are already hard at work updating our docs and refining our general process..

Code Freeze for 3.3 & Performance

We've been working feverishly to get Codename One 3.3 out of the door next week. Tomorrow morning we will finally have the codefreeze branch for 3.3 and we'll be able to focus on getting the docs/release in order.
The release should be on the 27th of the month and we should ideally get the plugins out of the door within the next couple of days.

Start right now with Codename One, learn more here