Summary
B4X is a suite of rapid application development tools for Android, iOS, desktop, server, and IoT projects. Its B4X programming language is described as a modern version of Visual Basic, and B4A, B4J, and B4i projects can share 90%+ of their code through cross-platform libraries. B4A includes a GUI designer for multiple screens and orientations, and supports device debugging over USB or a wireless bridge. B4J creates desktop interfaces, console programs, and server solutions that can run on Windows, Mac, Linux, and ARM boards such as Raspberry Pi. B4R targets Arduino, ESP8266, and ESP32. The maker says compiled iOS, Android, Arduino, and ESP8266 apps are native and have no dependencies. B4A, B4R, and B4J are free, including for commercial use; standard B4A and B4i licenses cost 59.00 USD once per developer. B4i requires an Apple developer account costing $99 per year, an iOS 11+ device, and Windows 7 64-bit or a VM for its IDE. Anywhere Software says it has specialized in mobile development since 2005.
Who it is for
B4X suits developers building across mobile, desktop, server, and IoT targets, especially those able to reuse code among B4A, B4J, and B4i projects. B4i users should account for its stated Apple account, device, and IDE requirements.
What is good
- B4A, B4J, and B4i projects can share 90%+ of code.
- B4A, B4R, and B4J are free for commercial use.
- B4A includes a multi-screen GUI designer.
- B4J targets Windows, Mac, Linux, and ARM boards.
What to know first
- B4i requires an Apple developer account costing $99 per year.
- B4i requires an iOS 11+ device.
- B4i IDE requires Windows 7 64-bit or a VM.
- Hosted Mac Builder supports projects up to 50mb.
Verdict
B4X spans mobile, desktop, server, and IoT development, with free tools for Android, desktop, and embedded targets. iOS development has specific account, device, and IDE requirements to factor in.
B4X plans and pricing
All plansCompared on mobile development IDEs
Facts
- Product
- B4X is a suite of rapid application development tools for Android, iOS, desktop, server and IoT solutions.b4x.com · 3 Oct 2026
- Language
- The B4X programming language is described as a modern version of Visual Basic.b4x.com · 3 Oct 2026
- Native builds
- The maker says compiled iOS, Android, Arduino and ESP8266 applications are native and have no dependencies.b4x.com · 3 Oct 2026
- Code sharing
- The maker says B4A, B4J and B4i projects can share 90%+ of their code using cross-platform libraries.b4x.com · 3 Oct 2026
- Android features
- B4A includes a GUI designer with support for multiple screens and orientations, and supports device debugging over wireless bridge or USB.b4x.com · 3 Oct 2026
- iOS requirements
- B4i requires an Apple developer account costing $99 per year, an iOS device running iOS 11+, and Windows 7 64-bit or a VM for its IDE.b4x.com · 3 Oct 2026
- iOS build limit
- The hosted Mac Builder service supports projects up to 50mb.b4x.com · 3 Oct 2026
- Desktop and server
- B4J creates desktop UI applications, console programs and server solutions, and its apps can run on Windows, Mac, Linux and ARM boards such as Raspberry Pi.b4x.com · 3 Oct 2026
- IoT and integrations
- B4R works with Arduino, ESP8266 and ESP32 and its setup instructions call for Arduino IDE v2 and Arduino CLI.b4x.com · 3 Oct 2026
- Libraries
- B4R libraries are stated to be open source under the MIT license, with code available on GitHub.b4x.com · 3 Oct 2026
- License terms
- The store says licenses are perpetual, per developer, and applications developed with B4A, B4i or B4J are royalty free.b4x.com · 3 Oct 2026
- Payment security
- The store states that payments are processed over a secured server.b4x.com · 3 Oct 2026
- Support
- The maker says it answers email within 24 hours and directs technical questions to its forum.b4x.com · 3 Oct 2026
- Audience and history
- Anywhere Software says it has specialized in mobile development since 2005 and develops and markets rapid application development tools for various platforms.b4x.com · 3 Oct 2026
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Sources
- b4x.com/contact_us.html· checked 3 Oct 2026
- b4x.com· checked 3 Oct 2026
- b4x.com/learn.html· checked 3 Oct 2026
- b4x.com/b4a.html· checked 3 Oct 2026
- b4x.com/b4i.html· checked 3 Oct 2026
- b4x.com/b4j.html· checked 3 Oct 2026
- b4x.com/b4r.html· checked 3 Oct 2026
- b4x.com/store_sale.html· checked 3 Oct 2026