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Gorgeous native mobile app development with Java or Kotlin for iPhone, Android etc....

Codename One Academy

Build complex real world apps with full backend and front end implementations!
Covers the full process of building these apps:

  • Uber clone app - functioning clone of an Uber app with driver mode, maps, hailing and more (check out the book!)
  • Facebook clone app - newsfeed, friends, like, comments and more
  • WhatsApp clone - chats over websocket and push
  • Restaurant Ordering App - Includes menu selection, billing etc.
  • App Builder - App builder application that generates restaurant specific apps
  • More Coming - we introduce a new app every 3 months and let you vote on it
 

180M App Installs

40K Developers

1M Cloud Builds

BuildWrite code in Java(tm) using Eclipse, NetBeans or IntelliJ/IDEA

TestVerify your app with our simulator, devices & test automation tools

DeployGenerate native binaries for all device types using the Codename One build cloud

What's so special about Codename One?

We are the only ones that provide...
Write Once Run Anywhere, no special hardware and 100% code reuse
Compile Java(tm) or Kotlin to native iOS, Windows (UWP), Android, Desktop and JavaScript
Easy to use with 100% portable Drag & Drop GUI builder
You can control every pixel and draw anywhere
Full access to native OS using the native language (e.g. Obj-C, C# etc.)
Use native widgets and mix them with our components in the hierarchy (heavyweight/lightweight mixing)
Open Source and Free for commercial use with enterprise grade commercial offering

Testimonials

Chidiebere Okwudire
Chidiebere Okwudire SMash ICT Solutions/Senior Engineer at Sioux, Netherlands

"Affordable cross-platform toolchain that works!"

Easy extension with third-party libraries, active developer support and attractive pricing...

Ram Nathaniel
Ram Nathaniel CEO and Founder of MathUnderground, Israel

"Over 2 million active installations"

[A] mature, solid and reliable platform. It allows you to concentrate [on] developing your app, not platform specific implementations...

Fabrício Cabeça
Fabrício Cabeça Senior Developer at Pmovil, Brazil

"Going from design to working app is a breeze"

Codename One greatly reduced our development time and costs, while giving us the ability to deliver a custom experience in each platform when needed.

Ali Sayed
Ali Sayed Senior Developer, Egypt

"The best cross platform app development tool"

Its native access allowed us to add functionalities without limiting developers to platform capabilities.

Fabrizio Grassi
Fabrizio Grassi Chemetall, Italy

"a true write once run anywhere solution!"

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

Rex Green
Rex Green Vision24, South Africa

"Fast and efficient"

Fast and efficient way to eliminate the hassle of targeting multiple platforms without resorting to HTML5!

Hélio Rugani
Hélio Rugani Sócio Proprietário, Brazil

"Simply a great framework!"

[We had] some non conventional requirements and Codename One gave us good answers for all the challenges that we faced during app development.

Gareth Murfin
Gareth Murfin Developer, Taiwan

"I utilize my Java knowledge to deliver native apps"

I can deliver native apps for both platforms from a single codebase in half the time, at half the cost, with no need to hire anyone.

 Lucky Oscar Masango
Lucky Oscar Masango CTO at BOi Global Group, South Africa

"I would advise to all developers to try it out today!"

[It] has given us the ability to develop apps for all mobile platforms [quickly] and at a low cost. [It's] the most innovative tool of this generation...

Get started right away!

Start Now! It's Free!

Built with Codename One

Check out the full gallery here and our demos here
Want us to build your mobile app? Learn more here

Latest Posts From Our Blog

Better Error Logging

Better Error Logging

A common pain point in most GUI frameworks is the hidden stack traces. When we have an app in production we get occasional emails from crash protection which are cryptic and hard to figure out. They usually start with the EDT loop and make no sense.

Zulu Desktop Builds

Zulu Desktop Builds

Sometimes you pick up a task and know in advance it's going to be hell to implement it. Sometimes, the hell you were expecting turns out to be WAY worse than you anticipated. This is the case for modern Java desktop deployment. Amazingly, Java was able to take one of the worse deployment processes possible and make it MUCH worse than before.

The Native Version of Build isn't Coming to iOS

The Native Version of Build isn't Coming to iOS

When we released Codename One 6.0 we mentioned that Codename One build is going through the approval process on iOS. We didn't mention that this was a process where Apple repeatedly rejected us and we had to appeal over and over again. 

Introduction to UIFragment

Introduction to UIFragment

New JSON and XML declarative notations for building user interfaces

Start now! It's free!