Make 6 simple mobile applications by Kivy and Xamarin and convert them by (antlr4 using java) to ionic

The applications are very simple (age calculator , change background color ,simple adder, modulus calculator...) and 3 other , I want to convert the layout "ui" and the backend code by antlrv4 using java to the same apps in ionic , It is very simple and I guess if you're expert it won't take more than a week.