Kivy Python GUI builders supports almost all platforms like Windows, Linux, OS X, and Android. Moreover, Kivy is a more useful GUI library because it uses the same codes for mobile and desktop applications. Furthermore, Kivy is an open-source Python GUI toolkit that is used for mobile applications and other multi-touch applications. WxPython is open-source. The source code is available to look at and modify as needed. It also allows the volunteer to contribute, fix, or improve the designs.