xtool is a cross-platform (Linux/WSL/macOS) tool that replicates Xcode functionality with open standards.

Apps similar to RubyMotion include Flutter, which is free and open source. Other options are Xcode, Apache Cordova, Notepad.exe and Appcelerator Titanium. You can choose from more than 10 Android Development Tools like RubyMotion for Mac, Windows, Linux, Android and iPhone.
xtool is a cross-platform (Linux/WSL/macOS) tool that replicates Xcode functionality with open standards.
