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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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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

Latest Posts From Our Blog

Release Plan For 3.2 & New Approach To Demos

Codename One 3.2 is scheduled for Tuesday the 27th of October. In keeping with our successful 3.1 release we'll use a very short one week code freeze on the 20th of October at which point we will only commit crucial fixes with code review. I hope we can land quite a few new features for the release, the GUI builder is getting very close although its still a very rough product and will only be featured as a "technology preview" showing the direction we are heading rather than a final product.

Integrating 3rd Party Native SDKs Part II

This blog post is part two in a three-part series on integrating 3rd party native SDKs into Codename One application. I recommend you start with part one in this series as it will give you much-needed context to understand the procedures described in part two and three.

Local Notifications on iOS and Android

We are happy to announce support for local notifications on iOS and Android. Local notifications are similar to push notifications, except that they are initiated locally by the app, rather than remotely. They are useful for communicating information to the user while the app is running in the background, since they manifest themselves as pop-up notifications on supported devices.

Integrating 3rd Party Native SDKs Part I

This past Thursday, we held our fourth webinar, and the topic was how to incorporate 3rd party native libraries into a Codename One app. I used the recently released FreshDesk cn1lib as a case study for this webinar. As the topic is a little involved, I decided to break it up into two webinars. In part one, we focused on the public API and architecture involved in developing a wrapper for a native SDK, and walked through the native implementation for Android.

Start right now with Codename One, learn more here