# Codename One 4.0 "Taxi" is now Live

DevFeed: [Codename One 4.0 "Taxi" is now Live](<https://devfeed.tech/articles/codename-one-4-0-taxi-is-now-live-19256.md>)

Original publisher: [Read original article](<https://www.codenameone.com/blog/codename-one-4-0-taxi-live/>)

Author: Shai Almog

Published: 2018-03-19T00:00:00Z

Content type: release

Language: en

Sources: [CodeName One](<https://devfeed.tech/sources/codename-one.md>)

Topics: [Mobile](<https://devfeed.tech/topics/mobile.md>), [PWA](<https://devfeed.tech/topics/pwa.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Java](<https://devfeed.tech/topics/java.md>), [Kotlin](<https://devfeed.tech/topics/kotlin.md>), [iOS](<https://devfeed.tech/topics/ios.md>), [ci](<https://devfeed.tech/topics/ci.md>), [Testing](<https://devfeed.tech/topics/testing.md>)

Tags: [continuous-integration](<https://devfeed.tech/tags/continuous-integration.md>), [ios](<https://devfeed.tech/tags/ios.md>), [java](<https://devfeed.tech/tags/java.md>), [kotlin](<https://devfeed.tech/tags/kotlin.md>), [mobile](<https://devfeed.tech/tags/mobile.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [pwa](<https://devfeed.tech/tags/pwa.md>), [release](<https://devfeed.tech/tags/release.md>), [testing](<https://devfeed.tech/tags/testing.md>)

## AI overview

Codename One 4.0, nicknamed Taxi, is an open-source mobile development release for Java and Kotlin developers. It adds Progressive Web App support, new device skins, updated iOS build tools, and improvements to native components, stability, unit testing, and continuous integration.

## Source excerpt

We are thrilled to announce the release of Codename One 4.0 - Taxi. Codename One is an open source "Write Once Run Anywhere" mobile solution for Java & Kotlin developers! This new release overhauled the way Codename One is updated, added support for Progressive Web Apps (PWA's), overhauled device skins & updated the backend iOS build tools. A major focus of this release is better support for peer (native) components, stability, unit testing and continuous integration.