HTML + CSS, iOS and Android all are complete design systems. Any UI that we design can be developed for these platforms.<p>Forgive my possibly naive understanding of mobile UI. Why is there no software/ service that allows us to develop on one platform and automatically transpiles into the other platforms?<p>Is it because it is extremely complex or because developing the UI is not the most time-consuming element of cross-platform development or both?<p>A form field for web -
<input ..../><p>is
<EditText ..../> for Android<p>and
<UITextInput ..../> for iOS
Kony is proprietary platform which does generate native app code ( <a href="https://www.kony.com/" rel="nofollow">https://www.kony.com/</a> )<p>Major problem for implementing such thing is that there is no exact 1-1 mapping between all UI elements. There are certainly few elements which has the mapping but all the features cannot be done with those.<p>Also, I remember that apple has problem with generated code.<p>Note: I worked for Kony few years back