Is it possible to write full-fledged cross-platform applications on Unity3d UI?

Question

Unity

At the moment, there are many options for writing cross-platform applications.
I don't like Phonegap because it uses the built-in browser. Like There is a good thing Xamarin.
But I was interested in such a thing as Unity3d UI. How convenient is this tool in terms of writing mobile applications. And most importantly, how are things going with performance? Maybe it will work slower than Phonegap?

Answer 1

Unity is a game engine, and the local ui is still raw, if you don't need 3D visualization, then you better look towards Xamarin or other solutions.