B4X - Rapid Application Development (RAD) tools for Android, iOS and desktop applications

Rapid Application Development (RAD) tools for native Android, iOS and desktop apps.
The simplest way to develop powerful, cross platform solutions.

100% native Android apps
(formerly known as Basic4android)

100% native iOS apps

Windows, Mac and Linux
desktop and server apps

B4X tools include all the features needed to develop great, real-world apps.
Compiled apps (iOS and Android) are 100% native without any dependencies.
Our community with more than 60k members is waiting to help you get started.

User Quotes

Morgan Matthews: "I downloaded the trial, completed the tutorials and purchased the Enterprise version within a few hours. I�ve made more progress with B4A in 3 hours than I have in 3 months with other Android IDEs."

Ilan Tetrusashvili: "I really enjoy B4i, this is a wonderful tool. I never thought that it would be so easy to develop for iOS."

Alfred Schenker: "Thanks to B4A and you guys with your help I got a pe...

Latest Versions

B4A v4.00

B4i v1.50

B4J v2.50

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